[JitDiff X64] [AndyAyersMS] JIT: Support for devirtualizing array interface methods

[MihuBot]

Job completed in 21 minutes 19 seconds.
dotnet/runtime#108153

Diffs

Diffs

Found 290 files with textual diffs.

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 39373252
Total bytes of diff: 39375798
Total bytes of delta: 2546 (0.01 % of base)
Total relative delta: 51.19
    diff is a regression.
    relative diff is a regression.


Top file regressions (bytes):
         784 : System.Linq.dasm (0.07 % of base)
         770 : System.Collections.Immutable.dasm (0.04 % of base)
         728 : System.Threading.Tasks.Dataflow.dasm (0.06 % of base)
         647 : System.Collections.dasm (0.15 % of base)
          17 : System.Private.CoreLib.dasm (0.00 % of base)
           8 : System.Reflection.Context.dasm (0.01 % of base)
           4 : System.Net.NameResolution.dasm (0.01 % of base)
           1 : System.ComponentModel.Composition.Registration.dasm (0.00 % of base)
           1 : System.Private.Xml.dasm (0.00 % of base)
           1 : System.Private.Xml.Linq.dasm (0.00 % of base)
           1 : System.Reflection.MetadataLoadContext.dasm (0.00 % of base)
           1 : System.Reflection.Emit.dasm (0.00 % of base)
           1 : System.Reflection.TypeExtensions.dasm (0.02 % of base)

Top file improvements (bytes):
        -115 : System.Linq.Expressions.dasm (-0.01 % of base)
        -105 : System.Private.DataContractSerialization.dasm (-0.01 % of base)
         -48 : Microsoft.Extensions.DependencyModel.dasm (-0.06 % of base)
         -30 : System.ComponentModel.Composition.dasm (-0.01 % of base)
         -22 : System.Composition.Convention.dasm (-0.02 % of base)
         -20 : Microsoft.CSharp.dasm (-0.01 % of base)
         -14 : Microsoft.VisualBasic.Core.dasm (-0.00 % of base)
         -12 : System.Net.Requests.dasm (-0.01 % of base)
         -12 : System.Net.Http.dasm (-0.00 % of base)
         -12 : Microsoft.Extensions.Http.dasm (-0.02 % of base)
          -8 : System.Composition.Hosting.dasm (-0.01 % of base)
          -8 : System.Linq.Queryable.dasm (-0.00 % of base)
          -6 : System.ComponentModel.Annotations.dasm (-0.01 % of base)
          -6 : System.Composition.TypedParts.dasm (-0.01 % of base)

27 total files with Code Size differences (14 improved, 13 regressed), 232 unchanged.

Top method regressions (bytes):
         112 (37.71 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[double]:MoveNext():ubyte:this (FullOpts)
         112 (38.36 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[int]:MoveNext():ubyte:this (FullOpts)
         112 (38.10 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[long]:MoveNext():ubyte:this (FullOpts)
         112 (37.97 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[short]:MoveNext():ubyte:this (FullOpts)
         112 (38.10 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[System.Nullable`1[int]]:MoveNext():ubyte:this (FullOpts)
         112 (36.25 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[System.Numerics.Vector`1[float]]:MoveNext():ubyte:this (FullOpts)
         112 (38.23 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[ubyte]:MoveNext():ubyte:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[double,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[double,System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[int,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[int,System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[long,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[long,System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[short,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[short,System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Nullable`1[int],System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[ubyte,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[ubyte,System.Nullable`1[int]]]:this (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[double]():System.Collections.Generic.IEnumerator`1[double] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[long]():System.Collections.Generic.IEnumerator`1[long] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[short]():System.Collections.Generic.IEnumerator`1[short] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[System.Nullable`1[int]]():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[System.Numerics.Vector`1[float]]():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[ubyte]():System.Collections.Generic.IEnumerator`1[ubyte] (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[double]:GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[int]:GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[long]:GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[short]:GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[System.Nullable`1[int]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[System.Numerics.Vector`1[float]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[ubyte]:GetEnumerator():System.Collections.Generic.IEnumerator`1[ubyte]:this (FullOpts)
          23 (82.14 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[int]():System.Collections.Generic.IEnumerator`1[int] (FullOpts)
           4 (16.67 % of base) : System.Net.Http.dasm - <>z__ReadOnlyArray`1[double]:System.Collections.Generic.ICollection<T>.CopyTo(double[],int):this (FullOpts)
           4 (16.67 % of base) : System.Net.NameResolution.dasm - <>z__ReadOnlyArray`1[double]:System.Collections.Generic.ICollection<T>.CopyTo(double[],int):this (FullOpts)
           3 (0.69 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:HasBuiltInEqualityOperator(System.Type,System.Type):ubyte (FullOpts)
           3 (0.48 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:StrictHasReferenceConversionTo(System.Type,System.Type,ubyte):ubyte (FullOpts)
           3 (1.06 % of base) : System.Private.CoreLib.dasm - System.Type:IsAssignableFrom(System.Type):ubyte:this (FullOpts)
           2 (0.52 % of base) : Microsoft.CSharp.dasm - Microsoft.CSharp.RuntimeBinder.Semantics.MemberLookup:IsDynamicMember(Microsoft.CSharp.RuntimeBinder.Semantics.Symbol):ubyte (FullOpts)
           2 (1.21 % of base) : System.Text.Json.dasm - System.Text.Json.Reflection.ReflectionExtensions:IsAssignableFromInternal(System.Type,System.Type):ubyte (FullOpts)
           1 (6.25 % of base) : Microsoft.VisualBasic.Core.dasm - Microsoft.VisualBasic.CompilerServices.Symbols:IsEnum(System.Type):ubyte (FullOpts)
           1 (6.25 % of base) : Microsoft.VisualBasic.Core.dasm - Microsoft.VisualBasic.CompilerServices.Symbols:IsGeneric(System.Type):ubyte (FullOpts)
           1 (1.43 % of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.ExportServices:IsDefaultMetadataViewType(System.Type):ubyte (FullOpts)
           1 (0.53 % of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.ReflectionModel.ImportType:IsDescendentOf(System.Type,System.Type):ubyte (FullOpts)
           1 (1.43 % of base) : System.ComponentModel.Composition.Registration.dasm - System.ComponentModel.Composition.Registration.RegistrationBuilder+<>c__DisplayClass9_0:<ForTypesDerivedFrom>b__0(System.Type):ubyte:this (FullOpts)
           1 (0.85 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:AreReferenceAssignable(System.Type,System.Type):ubyte (FullOpts)
           1 (3.57 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:IsImplicitReferenceConversion(System.Type,System.Type):ubyte (FullOpts)
           1 (5.26 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils+<>c:<.cctor>b__54_0(System.Type):ubyte:this (FullOpts)
           1 (5.26 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils+<>c:<.cctor>b__54_1(System.Type):System.Type:this (FullOpts)
           1 (1.67 % of base) : System.Private.CoreLib.dasm - System.Enum:GetUnderlyingType(System.Type):System.Type (FullOpts)
           1 (4.35 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Interpreter.ExceptionHandler:Matches(System.Type):ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:get_IsEnum():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:get_IsGenericType():ubyte:this (FullOpts)
           1 (4.35 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:get_TypeHandle():System.RuntimeTypeHandle:this (FullOpts)
           1 (4.35 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:GetEnumUnderlyingType():System.Type:this (FullOpts)
           1 (5.00 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:GetGenericTypeDefinition():System.Type:this (FullOpts)
           1 (4.35 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:IsAssignableFrom(System.Type):ubyte:this (FullOpts)
           1 (1.18 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Projection.ProjectingType:IsAssignableFrom(System.Type):ubyte:this (FullOpts)
           1 (1.25 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Projection.ProjectingType:IsInstanceOfType(System.Object):ubyte:this (FullOpts)
           1 (1.45 % of base) : System.Private.CoreLib.dasm - System.Reflection.Emit.DynamicMethod:IsDefined(System.Type,ubyte):ubyte:this (FullOpts)
           1 (1.47 % of base) : System.Private.CoreLib.dasm - System.Reflection.Emit.RuntimeEnumBuilder:IsAssignableFrom(System.Reflection.TypeInfo):ubyte:this (FullOpts)
           1 (1.47 % of base) : System.Reflection.Emit.dasm - System.Reflection.Emit.SymbolType:IsAssignableFrom(System.Reflection.TypeInfo):ubyte:this (FullOpts)
           1 (1.47 % of base) : System.Private.CoreLib.dasm - System.Reflection.Emit.SymbolType:IsAssignableFrom(System.Reflection.TypeInfo):ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.ModifiedType:get_IsByRefLike():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.ModifiedType:get_IsEnum():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.ModifiedType:get_IsGenericType():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.ModifiedType:GetGenericTypeDefinition():System.Type:this (FullOpts)
           1 (4.35 % of base) : System.Reflection.MetadataLoadContext.dasm - System.Reflection.RoModifiedType:get_IsEnum():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.SignatureConstructedGenericType:get_IsByRefLike():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.TypeDelegator:get_IsByRefLike():ubyte:this (FullOpts)
           1 (4.35 % of base) : System.Private.CoreLib.dasm - System.Reflection.TypeDelegator:get_TypeHandle():System.RuntimeTypeHandle:this (FullOpts)
           1 (1.49 % of base) : System.Private.CoreLib.dasm - System.Reflection.TypeDelegator:IsAssignableFrom(System.Reflection.TypeInfo):ubyte:this (FullOpts)
           1 (1.67 % of base) : System.Reflection.TypeExtensions.dasm - System.Reflection.TypeExtensions:IsAssignableFrom(System.Type,System.Type):ubyte (FullOpts)
           1 (1.47 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.Json.JsonFormatReaderGenerator+CriticalHelper:HasFactoryMethod(System.Runtime.Serialization.DataContracts.ClassDataContract):ubyte (FullOpts)
           1 (1.47 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.XmlFormatReaderGenerator+CriticalHelper:HasFactoryMethod(System.Runtime.Serialization.DataContracts.ClassDataContract):ubyte (FullOpts)
           1 (5.26 % of base) : System.Text.Json.dasm - System.Text.Json.Serialization.Converters.EnumConverterFactory:CanConvert(System.Type):ubyte:this (FullOpts)
           1 (5.26 % of base) : System.Text.Json.dasm - System.Text.Json.Serialization.JsonStringEnumConverter:CanConvert(System.Type):ubyte:this (FullOpts)
           1 (0.95 % of base) : System.Text.Json.dasm - System.Text.Json.Serialization.Metadata.JsonPropertyInfo:IsOverriddenOrShadowedBy(System.Text.Json.Serialization.Metadata.JsonPropertyInfo):ubyte:this (FullOpts)
           1 (6.25 % of base) : System.Text.Json.dasm - System.Text.Json.Serialization.Metadata.JsonTypeInfo:IsByRefLike(System.Type):ubyte (FullOpts)
           1 (2.70 % of base) : System.Private.CoreLib.dasm - System.Type:IsAssignableTo(System.Type):ubyte:this (FullOpts)
           1 (1.52 % of base) : System.Private.CoreLib.dasm - System.Type:IsInstanceOfType(System.Object):ubyte:this (FullOpts)
           1 (1.59 % of base) : System.Private.Xml.Linq.dasm - System.Xml.Linq.XHelper:IsInstanceOfType(System.Object,System.Type):ubyte (FullOpts)
           1 (0.45 % of base) : System.Private.Xml.dasm - System.Xml.Xsl.Runtime.XmlExtensionFunction:GetClrType(System.Type):System.Type:this (FullOpts)

Top method improvements (bytes):
         -38 (-0.86 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.ClassDataContract+ClassDataContractCriticalHelper:ImportDataMembers():this (FullOpts)
         -35 (-1.68 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.EnumDataContract+EnumDataContractCriticalHelper:ImportDataMembers():this (FullOpts)
         -24 (-0.63 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteListInitExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
         -20 (-0.83 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.DataContract:ImportKnownTypeAttributes(System.Type,System.Collections.Generic.Dictionary`2[System.Type,System.Type],byref) (FullOpts)
         -16 (-1.36 % of base) : Microsoft.CSharp.dasm - Microsoft.CSharp.RuntimeBinder.RuntimeBinder:DeferBinding(Microsoft.CSharp.RuntimeBinder.ICSharpBinder,Microsoft.CSharp.RuntimeBinder.ArgumentObject[],System.Dynamic.DynamicMetaObject[],Microsoft.CSharp.RuntimeBinder.Semantics.LocalVariableSymbol[],byref):ubyte:this (FullOpts)
         -16 (-8.04 % of base) : Microsoft.Extensions.DependencyModel.dasm - Microsoft.Extensions.DependencyModel.CompilationOptions:.cctor() (FullOpts)
         -16 (-2.44 % of base) : Microsoft.Extensions.DependencyModel.dasm - Microsoft.Extensions.DependencyModel.DependencyContextJsonReader:ReadRuntimes(byref):System.Collections.Generic.List`1[Microsoft.Extensions.DependencyModel.RuntimeFallbacks] (FullOpts)
         -16 (-9.88 % of base) : Microsoft.Extensions.DependencyModel.dasm - Microsoft.Extensions.DependencyModel.RuntimeAssetGroup:.ctor(System.String,System.String[]):this (FullOpts)
         -16 (-2.99 % of base) : Microsoft.VisualBasic.Core.dasm - Microsoft.VisualBasic.CompilerServices.Symbols+Container:LookupDefaultMembers(byref,System.Type):System.Reflection.MemberInfo[]:this (FullOpts)
         -16 (-4.41 % of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.CompositionException:.ctor(System.ComponentModel.Composition.CompositionError):this (FullOpts)
         -16 (-2.95 % of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.ExceptionBuilder:CreateCannotGetExportedValue(System.ComponentModel.Composition.Primitives.ComposablePart,System.ComponentModel.Composition.Primitives.ExportDefinition,System.Exception):System.ComponentModel.Composition.CompositionException (FullOpts)
         -16 (-7.77 % of base) : System.Composition.Convention.dasm - System.Composition.Convention.ImportConventionBuilder:IsSupportedImportManyType(System.Reflection.TypeInfo):ubyte (FullOpts)
         -13 (-4.15 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:HasReferenceEquality(System.Type,System.Type):ubyte (FullOpts)
         -12 (-1.48 % of base) : Microsoft.Extensions.Http.dasm - Microsoft.Extensions.Http.Logging.HttpHeadersLogValue:get_Values():System.Collections.Generic.List`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Object]]:this (FullOpts)
         -12 (-1.01 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteInvocationExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
         -12 (-1.22 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteMethodCallExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
         -12 (-1.01 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller+ListBindingRewriter:AsBinding():System.Linq.Expressions.MemberBinding:this (FullOpts)
         -12 (-1.44 % of base) : System.Net.Requests.dasm - System.Net.HttpWebResponse:get_Headers():System.Net.WebHeaderCollection:this (FullOpts)
         -10 (-7.94 % of base) : System.Net.Http.dasm - System.Net.Http.Headers.HttpHeaders:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
          -8 (-1.41 % of base) : System.Composition.Hosting.dasm - System.Composition.Hosting.Providers.ImportMany.ImportManyExportDescriptorProvider:GetExportDescriptors(System.Composition.Hosting.Core.CompositionContract,System.Composition.Hosting.Core.DependencyAccessor):System.Collections.Generic.IEnumerable`1[System.Composition.Hosting.Core.ExportDescriptorPromise]:this (FullOpts)
          -8 (-2.19 % of base) : System.Linq.Queryable.dasm - System.Linq.EnumerableRewriter:GetPublicType(System.Type):System.Type (FullOpts)
          -8 (-4.62 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Expression:GetDelegateType(System.Type[]):System.Type (FullOpts)
          -8 (-9.64 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.CollectionDataContract:IsCollectionInterface(System.Type):ubyte (FullOpts)
          -6 (-1.10 % of base) : Microsoft.CSharp.dasm - Microsoft.CSharp.RuntimeBinder.Semantics.TypeManager:InternalsVisibleTo(System.Reflection.Assembly,System.Reflection.Assembly):ubyte (FullOpts)
          -6 (-2.51 % of base) : System.ComponentModel.Annotations.dasm - System.ComponentModel.DataAnnotations.CompareAttribute:GetDisplayNameForProperty(System.Reflection.PropertyInfo):System.String:this (FullOpts)
          -6 (-0.35 % of base) : System.Composition.TypedParts.dasm - System.Composition.CompositionContextExtensions:SatisfyImportsInternal(System.Composition.CompositionContext,System.Object,System.Composition.Convention.AttributedModelProvider) (FullOpts)
          -6 (-1.95 % of base) : System.Composition.Convention.dasm - System.Composition.Convention.PartConventionBuilder:MemberHasExportMetadata(System.Reflection.MemberInfo):ubyte (FullOpts)
          -6 (-1.13 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteDynamicExpression(System.Linq.Expressions.Expression):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-0.77 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteIndexAssignment(System.Linq.Expressions.BinaryExpression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-0.90 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteIndexExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-0.91 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteNewArrayExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-1.09 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteNewExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-2.01 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller+ChildRewriter:get_Item(int,int):System.Linq.Expressions.Expression[]:this (FullOpts)
          -6 (-0.50 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller+ListBindingRewriter:AsExpression(System.Linq.Expressions.Expression):System.Linq.Expressions.Expression:this (FullOpts)
          -6 (-4.76 % of base) : System.Net.Http.dasm - System.Net.Http.Headers.HttpHeaders:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Collections.Generic.IEnumerable`1[System.String]]]:this (FullOpts)
          -6 (-0.99 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.ClassDataContract:IsNonAttributedTypeValidForSerialization(System.Type):ubyte (FullOpts)
          -6 (-2.04 % of base) : System.Text.Json.dasm - System.Text.Json.Reflection.ReflectionExtensions:IsInSubtypeRelationshipWith(System.Type,System.Type):ubyte (FullOpts)
          -3 (-1.90 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Expression:ParameterIsAssignable(System.Reflection.ParameterInfo,System.Type):ubyte (FullOpts)

Top method regressions (percentages):
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[double]:GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[int]:GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[long]:GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[short]:GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[System.Nullable`1[int]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[System.Numerics.Vector`1[float]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this (FullOpts)
         104 (452.17 % of base) : System.Threading.Tasks.Dataflow.dasm - System.Threading.Tasks.Dataflow.Internal.ImmutableArray`1[ubyte]:GetEnumerator():System.Collections.Generic.IEnumerator`1[ubyte]:this (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[double]():System.Collections.Generic.IEnumerator`1[double] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[long]():System.Collections.Generic.IEnumerator`1[long] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[short]():System.Collections.Generic.IEnumerator`1[short] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[System.Nullable`1[int]]():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[System.Numerics.Vector`1[float]]():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]] (FullOpts)
         104 (160.00 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[ubyte]():System.Collections.Generic.IEnumerator`1[ubyte] (FullOpts)
          23 (82.14 % of base) : System.Collections.dasm - System.Collections.Generic.EnumerableHelpers:GetEmptyEnumerator[int]():System.Collections.Generic.IEnumerator`1[int] (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[double,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[double,System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[int,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[int,System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[long,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[long,System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[short,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[short,System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[System.Nullable`1[int],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Nullable`1[int],System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.Numerics.Vector`1[float],System.Nullable`1[int]]]:this (FullOpts)
         110 (81.48 % of base) : System.Collections.Immutable.dasm - System.Collections.Frozen.FrozenDictionary`2[ubyte,System.Nullable`1[int]]:System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>.GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[ubyte,System.Nullable`1[int]]]:this (FullOpts)
         112 (38.36 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[int]:MoveNext():ubyte:this (FullOpts)
         112 (38.23 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[ubyte]:MoveNext():ubyte:this (FullOpts)
         112 (38.10 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[long]:MoveNext():ubyte:this (FullOpts)
         112 (38.10 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[System.Nullable`1[int]]:MoveNext():ubyte:this (FullOpts)
         112 (37.97 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[short]:MoveNext():ubyte:this (FullOpts)
         112 (37.71 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[double]:MoveNext():ubyte:this (FullOpts)
         112 (36.25 % of base) : System.Linq.dasm - System.Linq.Enumerable+AppendPrependN`1[System.Numerics.Vector`1[float]]:MoveNext():ubyte:this (FullOpts)
           4 (16.67 % of base) : System.Net.Http.dasm - <>z__ReadOnlyArray`1[double]:System.Collections.Generic.ICollection<T>.CopyTo(double[],int):this (FullOpts)
           4 (16.67 % of base) : System.Net.NameResolution.dasm - <>z__ReadOnlyArray`1[double]:System.Collections.Generic.ICollection<T>.CopyTo(double[],int):this (FullOpts)
           1 (6.25 % of base) : Microsoft.VisualBasic.Core.dasm - Microsoft.VisualBasic.CompilerServices.Symbols:IsEnum(System.Type):ubyte (FullOpts)
           1 (6.25 % of base) : Microsoft.VisualBasic.Core.dasm - Microsoft.VisualBasic.CompilerServices.Symbols:IsGeneric(System.Type):ubyte (FullOpts)
           1 (6.25 % of base) : System.Text.Json.dasm - System.Text.Json.Serialization.Metadata.JsonTypeInfo:IsByRefLike(System.Type):ubyte (FullOpts)
           1 (5.26 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils+<>c:<.cctor>b__54_0(System.Type):ubyte:this (FullOpts)
           1 (5.26 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils+<>c:<.cctor>b__54_1(System.Type):System.Type:this (FullOpts)
           1 (5.26 % of base) : System.Text.Json.dasm - System.Text.Json.Serialization.Converters.EnumConverterFactory:CanConvert(System.Type):ubyte:this (FullOpts)
           1 (5.26 % of base) : System.Text.Json.dasm - System.Text.Json.Serialization.JsonStringEnumConverter:CanConvert(System.Type):ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:get_IsEnum():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:get_IsGenericType():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:GetGenericTypeDefinition():System.Type:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.ModifiedType:get_IsByRefLike():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.ModifiedType:get_IsEnum():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.ModifiedType:get_IsGenericType():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.ModifiedType:GetGenericTypeDefinition():System.Type:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.SignatureConstructedGenericType:get_IsByRefLike():ubyte:this (FullOpts)
           1 (5.00 % of base) : System.Private.CoreLib.dasm - System.Reflection.TypeDelegator:get_IsByRefLike():ubyte:this (FullOpts)
           1 (4.35 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Interpreter.ExceptionHandler:Matches(System.Type):ubyte:this (FullOpts)
           1 (4.35 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:get_TypeHandle():System.RuntimeTypeHandle:this (FullOpts)
           1 (4.35 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:GetEnumUnderlyingType():System.Type:this (FullOpts)
           1 (4.35 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Delegation.DelegatingType:IsAssignableFrom(System.Type):ubyte:this (FullOpts)
           1 (4.35 % of base) : System.Reflection.MetadataLoadContext.dasm - System.Reflection.RoModifiedType:get_IsEnum():ubyte:this (FullOpts)
           1 (4.35 % of base) : System.Private.CoreLib.dasm - System.Reflection.TypeDelegator:get_TypeHandle():System.RuntimeTypeHandle:this (FullOpts)
           1 (3.57 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:IsImplicitReferenceConversion(System.Type,System.Type):ubyte (FullOpts)
           1 (2.70 % of base) : System.Private.CoreLib.dasm - System.Type:IsAssignableTo(System.Type):ubyte:this (FullOpts)
           1 (1.67 % of base) : System.Private.CoreLib.dasm - System.Enum:GetUnderlyingType(System.Type):System.Type (FullOpts)
           1 (1.67 % of base) : System.Reflection.TypeExtensions.dasm - System.Reflection.TypeExtensions:IsAssignableFrom(System.Type,System.Type):ubyte (FullOpts)
           1 (1.59 % of base) : System.Private.Xml.Linq.dasm - System.Xml.Linq.XHelper:IsInstanceOfType(System.Object,System.Type):ubyte (FullOpts)
           1 (1.52 % of base) : System.Private.CoreLib.dasm - System.Type:IsInstanceOfType(System.Object):ubyte:this (FullOpts)
           1 (1.49 % of base) : System.Private.CoreLib.dasm - System.Reflection.TypeDelegator:IsAssignableFrom(System.Reflection.TypeInfo):ubyte:this (FullOpts)
           1 (1.47 % of base) : System.Private.CoreLib.dasm - System.Reflection.Emit.RuntimeEnumBuilder:IsAssignableFrom(System.Reflection.TypeInfo):ubyte:this (FullOpts)
           1 (1.47 % of base) : System.Reflection.Emit.dasm - System.Reflection.Emit.SymbolType:IsAssignableFrom(System.Reflection.TypeInfo):ubyte:this (FullOpts)
           1 (1.47 % of base) : System.Private.CoreLib.dasm - System.Reflection.Emit.SymbolType:IsAssignableFrom(System.Reflection.TypeInfo):ubyte:this (FullOpts)
           1 (1.47 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.Json.JsonFormatReaderGenerator+CriticalHelper:HasFactoryMethod(System.Runtime.Serialization.DataContracts.ClassDataContract):ubyte (FullOpts)
           1 (1.47 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.XmlFormatReaderGenerator+CriticalHelper:HasFactoryMethod(System.Runtime.Serialization.DataContracts.ClassDataContract):ubyte (FullOpts)
           1 (1.45 % of base) : System.Private.CoreLib.dasm - System.Reflection.Emit.DynamicMethod:IsDefined(System.Type,ubyte):ubyte:this (FullOpts)
           1 (1.43 % of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.ExportServices:IsDefaultMetadataViewType(System.Type):ubyte (FullOpts)
           1 (1.43 % of base) : System.ComponentModel.Composition.Registration.dasm - System.ComponentModel.Composition.Registration.RegistrationBuilder+<>c__DisplayClass9_0:<ForTypesDerivedFrom>b__0(System.Type):ubyte:this (FullOpts)
           1 (1.25 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Projection.ProjectingType:IsInstanceOfType(System.Object):ubyte:this (FullOpts)
           2 (1.21 % of base) : System.Text.Json.dasm - System.Text.Json.Reflection.ReflectionExtensions:IsAssignableFromInternal(System.Type,System.Type):ubyte (FullOpts)
           1 (1.18 % of base) : System.Reflection.Context.dasm - System.Reflection.Context.Projection.ProjectingType:IsAssignableFrom(System.Type):ubyte:this (FullOpts)
           3 (1.06 % of base) : System.Private.CoreLib.dasm - System.Type:IsAssignableFrom(System.Type):ubyte:this (FullOpts)
           1 (0.95 % of base) : System.Text.Json.dasm - System.Text.Json.Serialization.Metadata.JsonPropertyInfo:IsOverriddenOrShadowedBy(System.Text.Json.Serialization.Metadata.JsonPropertyInfo):ubyte:this (FullOpts)
           1 (0.85 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:AreReferenceAssignable(System.Type,System.Type):ubyte (FullOpts)
           3 (0.69 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:HasBuiltInEqualityOperator(System.Type,System.Type):ubyte (FullOpts)
           1 (0.53 % of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.ReflectionModel.ImportType:IsDescendentOf(System.Type,System.Type):ubyte (FullOpts)
           2 (0.52 % of base) : Microsoft.CSharp.dasm - Microsoft.CSharp.RuntimeBinder.Semantics.MemberLookup:IsDynamicMember(Microsoft.CSharp.RuntimeBinder.Semantics.Symbol):ubyte (FullOpts)
           3 (0.48 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:StrictHasReferenceConversionTo(System.Type,System.Type,ubyte):ubyte (FullOpts)
           1 (0.45 % of base) : System.Private.Xml.dasm - System.Xml.Xsl.Runtime.XmlExtensionFunction:GetClrType(System.Type):System.Type:this (FullOpts)

Top method improvements (percentages):
         -16 (-9.88 % of base) : Microsoft.Extensions.DependencyModel.dasm - Microsoft.Extensions.DependencyModel.RuntimeAssetGroup:.ctor(System.String,System.String[]):this (FullOpts)
          -8 (-9.64 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.CollectionDataContract:IsCollectionInterface(System.Type):ubyte (FullOpts)
         -16 (-8.04 % of base) : Microsoft.Extensions.DependencyModel.dasm - Microsoft.Extensions.DependencyModel.CompilationOptions:.cctor() (FullOpts)
         -10 (-7.94 % of base) : System.Net.Http.dasm - System.Net.Http.Headers.HttpHeaders:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
         -16 (-7.77 % of base) : System.Composition.Convention.dasm - System.Composition.Convention.ImportConventionBuilder:IsSupportedImportManyType(System.Reflection.TypeInfo):ubyte (FullOpts)
          -6 (-4.76 % of base) : System.Net.Http.dasm - System.Net.Http.Headers.HttpHeaders:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Collections.Generic.IEnumerable`1[System.String]]]:this (FullOpts)
          -8 (-4.62 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Expression:GetDelegateType(System.Type[]):System.Type (FullOpts)
         -16 (-4.41 % of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.Composition.CompositionException:.ctor(System.ComponentModel.Composition.CompositionError):this (FullOpts)
         -13 (-4.15 % of base) : System.Linq.Expressions.dasm - System.Dynamic.Utils.TypeUtils:HasReferenceEquality(System.Type,System.Type):ubyte (FullOpts)
         -16 (-2.99 % of base) : Microsoft.VisualBasic.Core.dasm - Microsoft.VisualBasic.CompilerServices.Symbols+Container:LookupDefaultMembers(byref,System.Type):System.Reflection.MemberInfo[]:this (FullOpts)
         -16 (-2.95 % of base) : System.ComponentModel.Composition.dasm - System.ComponentModel.ExceptionBuilder:CreateCannotGetExportedValue(System.ComponentModel.Composition.Primitives.ComposablePart,System.ComponentModel.Composition.Primitives.ExportDefinition,System.Exception):System.ComponentModel.Composition.CompositionException (FullOpts)
          -6 (-2.51 % of base) : System.ComponentModel.Annotations.dasm - System.ComponentModel.DataAnnotations.CompareAttribute:GetDisplayNameForProperty(System.Reflection.PropertyInfo):System.String:this (FullOpts)
         -16 (-2.44 % of base) : Microsoft.Extensions.DependencyModel.dasm - Microsoft.Extensions.DependencyModel.DependencyContextJsonReader:ReadRuntimes(byref):System.Collections.Generic.List`1[Microsoft.Extensions.DependencyModel.RuntimeFallbacks] (FullOpts)
          -8 (-2.19 % of base) : System.Linq.Queryable.dasm - System.Linq.EnumerableRewriter:GetPublicType(System.Type):System.Type (FullOpts)
          -6 (-2.04 % of base) : System.Text.Json.dasm - System.Text.Json.Reflection.ReflectionExtensions:IsInSubtypeRelationshipWith(System.Type,System.Type):ubyte (FullOpts)
          -6 (-2.01 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller+ChildRewriter:get_Item(int,int):System.Linq.Expressions.Expression[]:this (FullOpts)
          -6 (-1.95 % of base) : System.Composition.Convention.dasm - System.Composition.Convention.PartConventionBuilder:MemberHasExportMetadata(System.Reflection.MemberInfo):ubyte (FullOpts)
          -3 (-1.90 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Expression:ParameterIsAssignable(System.Reflection.ParameterInfo,System.Type):ubyte (FullOpts)
         -35 (-1.68 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.EnumDataContract+EnumDataContractCriticalHelper:ImportDataMembers():this (FullOpts)
         -12 (-1.48 % of base) : Microsoft.Extensions.Http.dasm - Microsoft.Extensions.Http.Logging.HttpHeadersLogValue:get_Values():System.Collections.Generic.List`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Object]]:this (FullOpts)
         -12 (-1.44 % of base) : System.Net.Requests.dasm - System.Net.HttpWebResponse:get_Headers():System.Net.WebHeaderCollection:this (FullOpts)
          -8 (-1.41 % of base) : System.Composition.Hosting.dasm - System.Composition.Hosting.Providers.ImportMany.ImportManyExportDescriptorProvider:GetExportDescriptors(System.Composition.Hosting.Core.CompositionContract,System.Composition.Hosting.Core.DependencyAccessor):System.Collections.Generic.IEnumerable`1[System.Composition.Hosting.Core.ExportDescriptorPromise]:this (FullOpts)
         -16 (-1.36 % of base) : Microsoft.CSharp.dasm - Microsoft.CSharp.RuntimeBinder.RuntimeBinder:DeferBinding(Microsoft.CSharp.RuntimeBinder.ICSharpBinder,Microsoft.CSharp.RuntimeBinder.ArgumentObject[],System.Dynamic.DynamicMetaObject[],Microsoft.CSharp.RuntimeBinder.Semantics.LocalVariableSymbol[],byref):ubyte:this (FullOpts)
         -12 (-1.22 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteMethodCallExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-1.13 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteDynamicExpression(System.Linq.Expressions.Expression):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-1.10 % of base) : Microsoft.CSharp.dasm - Microsoft.CSharp.RuntimeBinder.Semantics.TypeManager:InternalsVisibleTo(System.Reflection.Assembly,System.Reflection.Assembly):ubyte (FullOpts)
          -6 (-1.09 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteNewExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
         -12 (-1.01 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller+ListBindingRewriter:AsBinding():System.Linq.Expressions.MemberBinding:this (FullOpts)
         -12 (-1.01 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteInvocationExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-0.99 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.ClassDataContract:IsNonAttributedTypeValidForSerialization(System.Type):ubyte (FullOpts)
          -6 (-0.91 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteNewArrayExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-0.90 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteIndexExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
         -38 (-0.86 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.ClassDataContract+ClassDataContractCriticalHelper:ImportDataMembers():this (FullOpts)
         -20 (-0.83 % of base) : System.Private.DataContractSerialization.dasm - System.Runtime.Serialization.DataContracts.DataContract:ImportKnownTypeAttributes(System.Type,System.Collections.Generic.Dictionary`2[System.Type,System.Type],byref) (FullOpts)
          -6 (-0.77 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteIndexAssignment(System.Linq.Expressions.BinaryExpression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
         -24 (-0.63 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller:RewriteListInitExpression(System.Linq.Expressions.Expression,int):System.Linq.Expressions.Compiler.StackSpiller+Result:this (FullOpts)
          -6 (-0.50 % of base) : System.Linq.Expressions.dasm - System.Linq.Expressions.Compiler.StackSpiller+ListBindingRewriter:AsExpression(System.Linq.Expressions.Expression):System.Linq.Expressions.Expression:this (FullOpts)
          -6 (-0.35 % of base) : System.Composition.TypedParts.dasm - System.Composition.CompositionContextExtensions:SatisfyImportsInternal(System.Composition.CompositionContext,System.Object,System.Composition.Convention.AttributedModelProvider) (FullOpts)

116 total methods with Code Size differences (38 improved, 78 regressed), 232408 unchanged.

--------------------------------------------------------------------------------

Artifacts:

• build-clr-checked-main.zip (93 MB)
• build-artifacts-main.zip (678 MB)
• build-clr-checked-pr.zip (93 MB)
• build-artifacts-pr.zip (679 MB)
• diff-frameworks.txt (48 KB)
• ShortDiffsRegressions.md (60 KB)
• LongDiffsRegressions.md (167 KB)
• ShortDiffsImprovements.md (59 KB)
• LongDiffsImprovements.md (453 KB)
• jit-diffs-frameworks.zip (267 MB)

[MihuBot]

Top method regressions

112 (37.71 % of base) - System.Linq.Enumerable+AppendPrependN`1[double]:MoveNext():ubyte:this

 ; Assembly listing for method System.Linq.Enumerable+AppendPrependN`1[double]:MoveNext():ubyte:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 4 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 7 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] ( 22, 12.50)     ref  ->  rbx         this class-hnd single-def <System.Linq.Enumerable+AppendPrependN`1[double]>
 ;* V01 loc0         [V01    ] (  0,  0   )     int  ->  zero-ref   
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V03 tmp1         [V03    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[double]>
 ;* V04 tmp2         [V04    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[double]>
-;* V05 tmp3         [V05    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
-;  V06 tmp4         [V06,T03] (  2,  2   )     ref  ->  rdi         single-def "argument with side effect"
-;  V07 cse0         [V07,T02] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
-;  V08 cse1         [V08,T04] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
-;  V09 cse2         [V09,T05] (  3,  1.50)     ref  ->  rdi         "CSE #03: moderate"
-;  V10 rat0         [V10,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
+;  V05 tmp3         [V05,T05] (  3,  1.50)     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[double]>
+;  V06 tmp4         [V06,T03] (  3,  3   )     ref  ->  r15         class-hnd single-def "Inlining Arg" <double[]>
+;* V07 tmp5         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <double[]>
+;  V08 tmp6         [V08,T08] (  3,  1.50)     int  ->  r14         "Inline stloc first use temp"
+;  V09 tmp7         [V09,T02] (  5,  5   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[double]>
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
+;  V11 cse0         [V11,T04] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
+;  V12 cse1         [V12,T06] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
+;  V13 cse2         [V13,T07] (  3,  1.50)     ref  ->  rdi         "CSE #04: moderate"
+;  V14 rat0         [V14,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 0
 
 G_M64558_IG01:
        push     rbp
        push     r15
+       push     r14
+       push     r13
        push     rbx
-       lea      rbp, [rsp+0x10]
+       lea      rbp, [rsp+0x20]
        mov      rbx, rdi
-						;; size=12 bbWeight=1 PerfScore 3.75
+						;; size=16 bbWeight=1 PerfScore 5.75
 G_M64558_IG02:
        mov      edi, dword ptr [rbx+0x14]
        dec      edi
        cmp      edi, 3
        ja       SHORT G_M64558_IG04
 						;; size=10 bbWeight=1 PerfScore 3.50
 G_M64558_IG03:
        mov      edi, edi
        lea      rsi, [reloc @RWD00]
        mov      esi, dword ptr [rsi+4*rdi]
        lea      rax, G_M64558_IG02
        add      rsi, rax
        jmp      rsi
 						;; size=24 bbWeight=0.80 PerfScore 4.80
 G_M64558_IG04:
        mov      rdi, gword ptr [rbx+0x20]
        test     rdi, rdi
        je       SHORT G_M64558_IG05
        mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
        call     [r11]System.IDisposable:Dispose():this
        xor      rax, rax
        mov      gword ptr [rbx+0x20], rax
 						;; size=28 bbWeight=0.50 PerfScore 3.88
 G_M64558_IG05:
        xor      eax, eax
        mov      qword ptr [rbx+0x08], rax
        mov      dword ptr [rbx+0x14], -1
 						;; size=13 bbWeight=0.50 PerfScore 1.12
 G_M64558_IG06:
        xor      eax, eax
 						;; size=2 bbWeight=0.50 PerfScore 0.12
 G_M64558_IG07:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
 G_M64558_IG08:
        mov      rsi, gword ptr [rbx+0x28]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x14], 2
 						;; size=20 bbWeight=0.50 PerfScore 2.25
 G_M64558_IG09:
        mov      r15, gword ptr [rbx+0x38]
        test     r15, r15
-       jne      G_M64558_IG13
+       jne      G_M64558_IG16
        mov      rdi, gword ptr [rbx+0x18]
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[double]:GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this
        call     [r11]System.Collections.Generic.IEnumerable`1[double]:GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this
        lea      rdi, bword ptr [rbx+0x20]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x14], 3
 						;; size=49 bbWeight=0.50 PerfScore 5.62
 G_M64558_IG10:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[double]:LoadFromEnumerator():ubyte:this
        call     [rax]System.Linq.Enumerable+AppendPrependIterator`1[double]:LoadFromEnumerator():ubyte:this
        test     eax, eax
-       jne      SHORT G_M64558_IG14
+       jne      G_M64558_IG17
        mov      rdi, gword ptr [rbx+0x30]
        test     rdi, rdi
        je       SHORT G_M64558_IG06
        mov      esi, dword ptr [rbx+0x44]
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.SingleLinkedNode`1[double]:ToArray(int):double[]:this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Linq.SingleLinkedNode`1[double]:ToArray(int):double[]:this
-       mov      rdi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[double]:GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this
-       call     [r11]System.Collections.Generic.IEnumerable`1[double]:GetEnumerator():System.Collections.Generic.IEnumerator`1[double]:this
+       mov      r15, rax
+       mov      r14d, dword ptr [r15+0x08]
+       test     r14d, r14d
+       jne      SHORT G_M64558_IG12
+       mov      rdi, 0xD1FFAB1E      ; global ptr
+       test     byte  ptr [rdi], 1
+       je       G_M64558_IG19
+						;; size=80 bbWeight=0.50 PerfScore 12.00
+G_M64558_IG11:
+       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[double]:Empty
+       mov      rsi, gword ptr [rdi]
+       jmp      SHORT G_M64558_IG13
+						;; size=15 bbWeight=0.50 PerfScore 2.12
+G_M64558_IG12:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[double]
+       call     CORINFO_HELP_NEWSFAST
+       mov      r13, rax
+       mov      dword ptr [r13+0x08], -1
+       mov      dword ptr [r13+0x0C], r14d
+       lea      rdi, bword ptr [r13+0x10]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      rsi, r13
+						;; size=45 bbWeight=0.50 PerfScore 2.75
+G_M64558_IG13:
        lea      rdi, bword ptr [rbx+0x20]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x14], 4
-						;; size=80 bbWeight=0.50 PerfScore 11.25
-G_M64558_IG11:
+						;; size=16 bbWeight=0.50 PerfScore 1.25
+G_M64558_IG14:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[double]:LoadFromEnumerator():ubyte:this
 						;; size=13 bbWeight=0.50 PerfScore 0.25
-G_M64558_IG12:
+G_M64558_IG15:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        tail.jmp [rax]System.Linq.Enumerable+AppendPrependIterator`1[double]:LoadFromEnumerator():ubyte:this
-						;; size=7 bbWeight=0.50 PerfScore 1.75
-G_M64558_IG13:
+						;; size=11 bbWeight=0.50 PerfScore 2.25
+G_M64558_IG16:
        vmovsd   xmm0, qword ptr [r15+0x10]
        vmovsd   qword ptr [rbx+0x08], xmm0
        mov      rsi, gword ptr [r15+0x08]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=24 bbWeight=0.50 PerfScore 4.75
-G_M64558_IG14:
+G_M64558_IG17:
        mov      eax, 1
 						;; size=5 bbWeight=0.50 PerfScore 0.12
-G_M64558_IG15:
+G_M64558_IG18:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
+G_M64558_IG19:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[double]
+       call     CORINFO_HELP_GET_GCSTATIC_BASE
+       jmp      G_M64558_IG11
+						;; size=20 bbWeight=0 PerfScore 0.00
 RWD00  	dd	G_M64558_IG08 - G_M64558_IG02
        	dd	G_M64558_IG09 - G_M64558_IG02
        	dd	G_M64558_IG10 - G_M64558_IG02
-       	dd	G_M64558_IG11 - G_M64558_IG02
+       	dd	G_M64558_IG14 - G_M64558_IG02
 
 
-; Total bytes of code 297, prolog size 12, PerfScore 45.67, instruction count 79, allocated bytes for code 297 (MethodHash=603a03d1) for method System.Linq.Enumerable+AppendPrependN`1[double]:MoveNext():ubyte:this (FullOpts)
+; Total bytes of code 409, prolog size 16, PerfScore 56.05, instruction count 105, allocated bytes for code 409 (MethodHash=603a03d1) for method System.Linq.Enumerable+AppendPrependN`1[double]:MoveNext():ubyte:this (FullOpts)
 ; ============================================================

112 (38.36 % of base) - System.Linq.Enumerable+AppendPrependN`1[int]:MoveNext():ubyte:this

 ; Assembly listing for method System.Linq.Enumerable+AppendPrependN`1[int]:MoveNext():ubyte:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 4 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 7 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] ( 22, 12.50)     ref  ->  rbx         this class-hnd single-def <System.Linq.Enumerable+AppendPrependN`1[int]>
 ;* V01 loc0         [V01    ] (  0,  0   )     int  ->  zero-ref   
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V03 tmp1         [V03    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[int]>
 ;* V04 tmp2         [V04    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[int]>
-;* V05 tmp3         [V05    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
-;  V06 tmp4         [V06,T03] (  2,  2   )     ref  ->  rdi         single-def "argument with side effect"
-;  V07 cse0         [V07,T02] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
-;  V08 cse1         [V08,T04] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
-;  V09 cse2         [V09,T05] (  3,  1.50)     ref  ->  rdi         "CSE #03: moderate"
-;  V10 rat0         [V10,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
+;  V05 tmp3         [V05,T05] (  3,  1.50)     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[int]>
+;  V06 tmp4         [V06,T03] (  3,  3   )     ref  ->  r15         class-hnd single-def "Inlining Arg" <int[]>
+;* V07 tmp5         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <int[]>
+;  V08 tmp6         [V08,T08] (  3,  1.50)     int  ->  r14         "Inline stloc first use temp"
+;  V09 tmp7         [V09,T02] (  5,  5   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[int]>
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
+;  V11 cse0         [V11,T04] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
+;  V12 cse1         [V12,T06] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
+;  V13 cse2         [V13,T07] (  3,  1.50)     ref  ->  rdi         "CSE #04: moderate"
+;  V14 rat0         [V14,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 0
 
 G_M19976_IG01:
        push     rbp
        push     r15
+       push     r14
+       push     r13
        push     rbx
-       lea      rbp, [rsp+0x10]
+       lea      rbp, [rsp+0x20]
        mov      rbx, rdi
-						;; size=12 bbWeight=1 PerfScore 3.75
+						;; size=16 bbWeight=1 PerfScore 5.75
 G_M19976_IG02:
        mov      edi, dword ptr [rbx+0x0C]
        dec      edi
        cmp      edi, 3
        ja       SHORT G_M19976_IG04
 						;; size=10 bbWeight=1 PerfScore 3.50
 G_M19976_IG03:
        mov      edi, edi
        lea      rsi, [reloc @RWD00]
        mov      esi, dword ptr [rsi+4*rdi]
        lea      rax, G_M19976_IG02
        add      rsi, rax
        jmp      rsi
 						;; size=24 bbWeight=0.80 PerfScore 4.80
 G_M19976_IG04:
        mov      rdi, gword ptr [rbx+0x20]
        test     rdi, rdi
        je       SHORT G_M19976_IG05
        mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
        call     [r11]System.IDisposable:Dispose():this
        xor      rax, rax
        mov      gword ptr [rbx+0x20], rax
 						;; size=28 bbWeight=0.50 PerfScore 3.88
 G_M19976_IG05:
        xor      eax, eax
        mov      dword ptr [rbx+0x10], eax
        mov      dword ptr [rbx+0x0C], -1
 						;; size=12 bbWeight=0.50 PerfScore 1.12
 G_M19976_IG06:
        xor      eax, eax
 						;; size=2 bbWeight=0.50 PerfScore 0.12
 G_M19976_IG07:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
 G_M19976_IG08:
        mov      rsi, gword ptr [rbx+0x28]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 2
 						;; size=20 bbWeight=0.50 PerfScore 2.25
 G_M19976_IG09:
        mov      r15, gword ptr [rbx+0x38]
        test     r15, r15
-       jne      G_M19976_IG13
+       jne      G_M19976_IG16
        mov      rdi, gword ptr [rbx+0x18]
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[int]:GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this
        call     [r11]System.Collections.Generic.IEnumerable`1[int]:GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this
        lea      rdi, bword ptr [rbx+0x20]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 3
 						;; size=49 bbWeight=0.50 PerfScore 5.62
 G_M19976_IG10:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[int]:LoadFromEnumerator():ubyte:this
        call     [rax]System.Linq.Enumerable+AppendPrependIterator`1[int]:LoadFromEnumerator():ubyte:this
        test     eax, eax
-       jne      SHORT G_M19976_IG14
+       jne      G_M19976_IG17
        mov      rdi, gword ptr [rbx+0x30]
        test     rdi, rdi
        je       SHORT G_M19976_IG06
        mov      esi, dword ptr [rbx+0x44]
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.SingleLinkedNode`1[int]:ToArray(int):int[]:this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Linq.SingleLinkedNode`1[int]:ToArray(int):int[]:this
-       mov      rdi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[int]:GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this
-       call     [r11]System.Collections.Generic.IEnumerable`1[int]:GetEnumerator():System.Collections.Generic.IEnumerator`1[int]:this
+       mov      r15, rax
+       mov      r14d, dword ptr [r15+0x08]
+       test     r14d, r14d
+       jne      SHORT G_M19976_IG12
+       mov      rdi, 0xD1FFAB1E      ; global ptr
+       test     byte  ptr [rdi], 1
+       je       G_M19976_IG19
+						;; size=80 bbWeight=0.50 PerfScore 12.00
+G_M19976_IG11:
+       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[int]:Empty
+       mov      rsi, gword ptr [rdi]
+       jmp      SHORT G_M19976_IG13
+						;; size=15 bbWeight=0.50 PerfScore 2.12
+G_M19976_IG12:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[int]
+       call     CORINFO_HELP_NEWSFAST
+       mov      r13, rax
+       mov      dword ptr [r13+0x08], -1
+       mov      dword ptr [r13+0x0C], r14d
+       lea      rdi, bword ptr [r13+0x10]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      rsi, r13
+						;; size=45 bbWeight=0.50 PerfScore 2.75
+G_M19976_IG13:
        lea      rdi, bword ptr [rbx+0x20]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 4
-						;; size=80 bbWeight=0.50 PerfScore 11.25
-G_M19976_IG11:
+						;; size=16 bbWeight=0.50 PerfScore 1.25
+G_M19976_IG14:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[int]:LoadFromEnumerator():ubyte:this
 						;; size=13 bbWeight=0.50 PerfScore 0.25
-G_M19976_IG12:
+G_M19976_IG15:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        tail.jmp [rax]System.Linq.Enumerable+AppendPrependIterator`1[int]:LoadFromEnumerator():ubyte:this
-						;; size=7 bbWeight=0.50 PerfScore 1.75
-G_M19976_IG13:
+						;; size=11 bbWeight=0.50 PerfScore 2.25
+G_M19976_IG16:
        mov      edi, dword ptr [r15+0x10]
        mov      dword ptr [rbx+0x10], edi
        mov      rsi, gword ptr [r15+0x08]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=20 bbWeight=0.50 PerfScore 3.25
-G_M19976_IG14:
+G_M19976_IG17:
        mov      eax, 1
 						;; size=5 bbWeight=0.50 PerfScore 0.12
-G_M19976_IG15:
+G_M19976_IG18:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
+G_M19976_IG19:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[int]
+       call     CORINFO_HELP_GET_GCSTATIC_BASE
+       jmp      G_M19976_IG11
+						;; size=20 bbWeight=0 PerfScore 0.00
 RWD00  	dd	G_M19976_IG08 - G_M19976_IG02
        	dd	G_M19976_IG09 - G_M19976_IG02
        	dd	G_M19976_IG10 - G_M19976_IG02
-       	dd	G_M19976_IG11 - G_M19976_IG02
+       	dd	G_M19976_IG14 - G_M19976_IG02
 
 
-; Total bytes of code 292, prolog size 12, PerfScore 44.17, instruction count 79, allocated bytes for code 292 (MethodHash=f166b1f7) for method System.Linq.Enumerable+AppendPrependN`1[int]:MoveNext():ubyte:this (FullOpts)
+; Total bytes of code 404, prolog size 16, PerfScore 54.55, instruction count 105, allocated bytes for code 404 (MethodHash=f166b1f7) for method System.Linq.Enumerable+AppendPrependN`1[int]:MoveNext():ubyte:this (FullOpts)
 ; ============================================================

112 (38.10 % of base) - System.Linq.Enumerable+AppendPrependN`1[long]:MoveNext():ubyte:this

 ; Assembly listing for method System.Linq.Enumerable+AppendPrependN`1[long]:MoveNext():ubyte:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 4 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 7 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] ( 22, 12.50)     ref  ->  rbx         this class-hnd single-def <System.Linq.Enumerable+AppendPrependN`1[long]>
 ;* V01 loc0         [V01    ] (  0,  0   )     int  ->  zero-ref   
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V03 tmp1         [V03    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[long]>
 ;* V04 tmp2         [V04    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[long]>
-;* V05 tmp3         [V05    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
-;  V06 tmp4         [V06,T03] (  2,  2   )     ref  ->  rdi         single-def "argument with side effect"
-;  V07 cse0         [V07,T02] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
-;  V08 cse1         [V08,T04] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
-;  V09 cse2         [V09,T05] (  3,  1.50)     ref  ->  rdi         "CSE #03: moderate"
-;  V10 rat0         [V10,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
+;  V05 tmp3         [V05,T05] (  3,  1.50)     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[long]>
+;  V06 tmp4         [V06,T03] (  3,  3   )     ref  ->  r15         class-hnd single-def "Inlining Arg" <long[]>
+;* V07 tmp5         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <long[]>
+;  V08 tmp6         [V08,T08] (  3,  1.50)     int  ->  r14         "Inline stloc first use temp"
+;  V09 tmp7         [V09,T02] (  5,  5   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[long]>
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
+;  V11 cse0         [V11,T04] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
+;  V12 cse1         [V12,T06] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
+;  V13 cse2         [V13,T07] (  3,  1.50)     ref  ->  rdi         "CSE #04: moderate"
+;  V14 rat0         [V14,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 0
 
 G_M3953_IG01:
        push     rbp
        push     r15
+       push     r14
+       push     r13
        push     rbx
-       lea      rbp, [rsp+0x10]
+       lea      rbp, [rsp+0x20]
        mov      rbx, rdi
-						;; size=12 bbWeight=1 PerfScore 3.75
+						;; size=16 bbWeight=1 PerfScore 5.75
 G_M3953_IG02:
        mov      edi, dword ptr [rbx+0x14]
        dec      edi
        cmp      edi, 3
        ja       SHORT G_M3953_IG04
 						;; size=10 bbWeight=1 PerfScore 3.50
 G_M3953_IG03:
        mov      edi, edi
        lea      rsi, [reloc @RWD00]
        mov      esi, dword ptr [rsi+4*rdi]
        lea      rax, G_M3953_IG02
        add      rsi, rax
        jmp      rsi
 						;; size=24 bbWeight=0.80 PerfScore 4.80
 G_M3953_IG04:
        mov      rdi, gword ptr [rbx+0x20]
        test     rdi, rdi
        je       SHORT G_M3953_IG05
        mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
        call     [r11]System.IDisposable:Dispose():this
        xor      rax, rax
        mov      gword ptr [rbx+0x20], rax
 						;; size=28 bbWeight=0.50 PerfScore 3.88
 G_M3953_IG05:
        xor      eax, eax
        mov      qword ptr [rbx+0x08], rax
        mov      dword ptr [rbx+0x14], -1
 						;; size=13 bbWeight=0.50 PerfScore 1.12
 G_M3953_IG06:
        xor      eax, eax
 						;; size=2 bbWeight=0.50 PerfScore 0.12
 G_M3953_IG07:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
 G_M3953_IG08:
        mov      rsi, gword ptr [rbx+0x28]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x14], 2
 						;; size=20 bbWeight=0.50 PerfScore 2.25
 G_M3953_IG09:
        mov      r15, gword ptr [rbx+0x38]
        test     r15, r15
-       jne      G_M3953_IG13
+       jne      G_M3953_IG16
        mov      rdi, gword ptr [rbx+0x18]
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[long]:GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this
        call     [r11]System.Collections.Generic.IEnumerable`1[long]:GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this
        lea      rdi, bword ptr [rbx+0x20]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x14], 3
 						;; size=49 bbWeight=0.50 PerfScore 5.62
 G_M3953_IG10:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[long]:LoadFromEnumerator():ubyte:this
        call     [rax]System.Linq.Enumerable+AppendPrependIterator`1[long]:LoadFromEnumerator():ubyte:this
        test     eax, eax
-       jne      SHORT G_M3953_IG14
+       jne      G_M3953_IG17
        mov      rdi, gword ptr [rbx+0x30]
        test     rdi, rdi
        je       SHORT G_M3953_IG06
        mov      esi, dword ptr [rbx+0x44]
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.SingleLinkedNode`1[long]:ToArray(int):long[]:this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Linq.SingleLinkedNode`1[long]:ToArray(int):long[]:this
-       mov      rdi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[long]:GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this
-       call     [r11]System.Collections.Generic.IEnumerable`1[long]:GetEnumerator():System.Collections.Generic.IEnumerator`1[long]:this
+       mov      r15, rax
+       mov      r14d, dword ptr [r15+0x08]
+       test     r14d, r14d
+       jne      SHORT G_M3953_IG12
+       mov      rdi, 0xD1FFAB1E      ; global ptr
+       test     byte  ptr [rdi], 1
+       je       G_M3953_IG19
+						;; size=80 bbWeight=0.50 PerfScore 12.00
+G_M3953_IG11:
+       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[long]:Empty
+       mov      rsi, gword ptr [rdi]
+       jmp      SHORT G_M3953_IG13
+						;; size=15 bbWeight=0.50 PerfScore 2.12
+G_M3953_IG12:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[long]
+       call     CORINFO_HELP_NEWSFAST
+       mov      r13, rax
+       mov      dword ptr [r13+0x08], -1
+       mov      dword ptr [r13+0x0C], r14d
+       lea      rdi, bword ptr [r13+0x10]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      rsi, r13
+						;; size=45 bbWeight=0.50 PerfScore 2.75
+G_M3953_IG13:
        lea      rdi, bword ptr [rbx+0x20]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x14], 4
-						;; size=80 bbWeight=0.50 PerfScore 11.25
-G_M3953_IG11:
+						;; size=16 bbWeight=0.50 PerfScore 1.25
+G_M3953_IG14:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[long]:LoadFromEnumerator():ubyte:this
 						;; size=13 bbWeight=0.50 PerfScore 0.25
-G_M3953_IG12:
+G_M3953_IG15:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        tail.jmp [rax]System.Linq.Enumerable+AppendPrependIterator`1[long]:LoadFromEnumerator():ubyte:this
-						;; size=7 bbWeight=0.50 PerfScore 1.75
-G_M3953_IG13:
+						;; size=11 bbWeight=0.50 PerfScore 2.25
+G_M3953_IG16:
        mov      rdi, qword ptr [r15+0x10]
        mov      qword ptr [rbx+0x08], rdi
        mov      rsi, gword ptr [r15+0x08]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=21 bbWeight=0.50 PerfScore 3.25
-G_M3953_IG14:
+G_M3953_IG17:
        mov      eax, 1
 						;; size=5 bbWeight=0.50 PerfScore 0.12
-G_M3953_IG15:
+G_M3953_IG18:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
+G_M3953_IG19:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[long]
+       call     CORINFO_HELP_GET_GCSTATIC_BASE
+       jmp      G_M3953_IG11
+						;; size=20 bbWeight=0 PerfScore 0.00
 RWD00  	dd	G_M3953_IG08 - G_M3953_IG02
        	dd	G_M3953_IG09 - G_M3953_IG02
        	dd	G_M3953_IG10 - G_M3953_IG02
-       	dd	G_M3953_IG11 - G_M3953_IG02
+       	dd	G_M3953_IG14 - G_M3953_IG02
 
 
-; Total bytes of code 294, prolog size 12, PerfScore 44.17, instruction count 79, allocated bytes for code 294 (MethodHash=6677f08e) for method System.Linq.Enumerable+AppendPrependN`1[long]:MoveNext():ubyte:this (FullOpts)
+; Total bytes of code 406, prolog size 16, PerfScore 54.55, instruction count 105, allocated bytes for code 406 (MethodHash=6677f08e) for method System.Linq.Enumerable+AppendPrependN`1[long]:MoveNext():ubyte:this (FullOpts)
 ; ============================================================

112 (37.97 % of base) - System.Linq.Enumerable+AppendPrependN`1[short]:MoveNext():ubyte:this

 ; Assembly listing for method System.Linq.Enumerable+AppendPrependN`1[short]:MoveNext():ubyte:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 4 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 7 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] ( 22, 12.50)     ref  ->  rbx         this class-hnd single-def <System.Linq.Enumerable+AppendPrependN`1[short]>
 ;* V01 loc0         [V01    ] (  0,  0   )     int  ->  zero-ref   
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V03 tmp1         [V03    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[short]>
 ;* V04 tmp2         [V04    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[short]>
-;* V05 tmp3         [V05    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
-;  V06 tmp4         [V06,T03] (  2,  2   )     ref  ->  rdi         single-def "argument with side effect"
-;  V07 cse0         [V07,T02] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
-;  V08 cse1         [V08,T04] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
-;  V09 cse2         [V09,T05] (  3,  1.50)     ref  ->  rdi         "CSE #03: moderate"
-;  V10 rat0         [V10,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
+;  V05 tmp3         [V05,T05] (  3,  1.50)     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[short]>
+;  V06 tmp4         [V06,T03] (  3,  3   )     ref  ->  r15         class-hnd single-def "Inlining Arg" <short[]>
+;* V07 tmp5         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <short[]>
+;  V08 tmp6         [V08,T08] (  3,  1.50)     int  ->  r14         "Inline stloc first use temp"
+;  V09 tmp7         [V09,T02] (  5,  5   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[short]>
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
+;  V11 cse0         [V11,T04] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
+;  V12 cse1         [V12,T06] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
+;  V13 cse2         [V13,T07] (  3,  1.50)     ref  ->  rdi         "CSE #04: moderate"
+;  V14 rat0         [V14,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 0
 
 G_M63209_IG01:
        push     rbp
        push     r15
+       push     r14
+       push     r13
        push     rbx
-       lea      rbp, [rsp+0x10]
+       lea      rbp, [rsp+0x20]
        mov      rbx, rdi
-						;; size=12 bbWeight=1 PerfScore 3.75
+						;; size=16 bbWeight=1 PerfScore 5.75
 G_M63209_IG02:
        mov      edi, dword ptr [rbx+0x0C]
        dec      edi
        cmp      edi, 3
        ja       SHORT G_M63209_IG04
 						;; size=10 bbWeight=1 PerfScore 3.50
 G_M63209_IG03:
        mov      edi, edi
        lea      rsi, [reloc @RWD00]
        mov      esi, dword ptr [rsi+4*rdi]
        lea      rax, G_M63209_IG02
        add      rsi, rax
        jmp      rsi
 						;; size=24 bbWeight=0.80 PerfScore 4.80
 G_M63209_IG04:
        mov      rdi, gword ptr [rbx+0x20]
        test     rdi, rdi
        je       SHORT G_M63209_IG05
        mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
        call     [r11]System.IDisposable:Dispose():this
        xor      rax, rax
        mov      gword ptr [rbx+0x20], rax
 						;; size=28 bbWeight=0.50 PerfScore 3.88
 G_M63209_IG05:
        mov      word  ptr [rbx+0x10], 0
        mov      dword ptr [rbx+0x0C], -1
 						;; size=13 bbWeight=0.50 PerfScore 1.00
 G_M63209_IG06:
        xor      eax, eax
 						;; size=2 bbWeight=0.50 PerfScore 0.12
 G_M63209_IG07:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
 G_M63209_IG08:
        mov      rsi, gword ptr [rbx+0x28]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 2
 						;; size=20 bbWeight=0.50 PerfScore 2.25
 G_M63209_IG09:
        mov      r15, gword ptr [rbx+0x38]
        test     r15, r15
-       jne      G_M63209_IG13
+       jne      G_M63209_IG16
        mov      rdi, gword ptr [rbx+0x18]
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[short]:GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this
        call     [r11]System.Collections.Generic.IEnumerable`1[short]:GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this
        lea      rdi, bword ptr [rbx+0x20]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 3
 						;; size=49 bbWeight=0.50 PerfScore 5.62
 G_M63209_IG10:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[short]:LoadFromEnumerator():ubyte:this
        call     [rax]System.Linq.Enumerable+AppendPrependIterator`1[short]:LoadFromEnumerator():ubyte:this
        test     eax, eax
-       jne      SHORT G_M63209_IG14
+       jne      G_M63209_IG17
        mov      rdi, gword ptr [rbx+0x30]
        test     rdi, rdi
        je       SHORT G_M63209_IG06
        mov      esi, dword ptr [rbx+0x44]
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.SingleLinkedNode`1[short]:ToArray(int):short[]:this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Linq.SingleLinkedNode`1[short]:ToArray(int):short[]:this
-       mov      rdi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[short]:GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this
-       call     [r11]System.Collections.Generic.IEnumerable`1[short]:GetEnumerator():System.Collections.Generic.IEnumerator`1[short]:this
+       mov      r15, rax
+       mov      r14d, dword ptr [r15+0x08]
+       test     r14d, r14d
+       jne      SHORT G_M63209_IG12
+       mov      rdi, 0xD1FFAB1E      ; global ptr
+       test     byte  ptr [rdi], 1
+       je       G_M63209_IG19
+						;; size=80 bbWeight=0.50 PerfScore 12.00
+G_M63209_IG11:
+       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[short]:Empty
+       mov      rsi, gword ptr [rdi]
+       jmp      SHORT G_M63209_IG13
+						;; size=15 bbWeight=0.50 PerfScore 2.12
+G_M63209_IG12:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[short]
+       call     CORINFO_HELP_NEWSFAST
+       mov      r13, rax
+       mov      dword ptr [r13+0x08], -1
+       mov      dword ptr [r13+0x0C], r14d
+       lea      rdi, bword ptr [r13+0x10]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      rsi, r13
+						;; size=45 bbWeight=0.50 PerfScore 2.75
+G_M63209_IG13:
        lea      rdi, bword ptr [rbx+0x20]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 4
-						;; size=80 bbWeight=0.50 PerfScore 11.25
-G_M63209_IG11:
+						;; size=16 bbWeight=0.50 PerfScore 1.25
+G_M63209_IG14:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[short]:LoadFromEnumerator():ubyte:this
 						;; size=13 bbWeight=0.50 PerfScore 0.25
-G_M63209_IG12:
+G_M63209_IG15:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        tail.jmp [rax]System.Linq.Enumerable+AppendPrependIterator`1[short]:LoadFromEnumerator():ubyte:this
-						;; size=7 bbWeight=0.50 PerfScore 1.75
-G_M63209_IG13:
+						;; size=11 bbWeight=0.50 PerfScore 2.25
+G_M63209_IG16:
        movsx    rdi, word  ptr [r15+0x10]
        mov      word  ptr [rbx+0x10], di
        mov      rsi, gword ptr [r15+0x08]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=22 bbWeight=0.50 PerfScore 4.25
-G_M63209_IG14:
+G_M63209_IG17:
        mov      eax, 1
 						;; size=5 bbWeight=0.50 PerfScore 0.12
-G_M63209_IG15:
+G_M63209_IG18:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
+G_M63209_IG19:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[short]
+       call     CORINFO_HELP_GET_GCSTATIC_BASE
+       jmp      G_M63209_IG11
+						;; size=20 bbWeight=0 PerfScore 0.00
 RWD00  	dd	G_M63209_IG08 - G_M63209_IG02
        	dd	G_M63209_IG09 - G_M63209_IG02
        	dd	G_M63209_IG10 - G_M63209_IG02
-       	dd	G_M63209_IG11 - G_M63209_IG02
+       	dd	G_M63209_IG14 - G_M63209_IG02
 
 
-; Total bytes of code 295, prolog size 12, PerfScore 45.05, instruction count 78, allocated bytes for code 295 (MethodHash=37de0916) for method System.Linq.Enumerable+AppendPrependN`1[short]:MoveNext():ubyte:this (FullOpts)
+; Total bytes of code 407, prolog size 16, PerfScore 55.42, instruction count 104, allocated bytes for code 407 (MethodHash=37de0916) for method System.Linq.Enumerable+AppendPrependN`1[short]:MoveNext():ubyte:this (FullOpts)
 ; ============================================================

112 (38.10 % of base) - System.Linq.Enumerable+AppendPrependN`1[System.Nullable`1[int]]:MoveNext():ubyte:this

 ; Assembly listing for method System.Linq.Enumerable+AppendPrependN`1[System.Nullable`1[int]]:MoveNext():ubyte:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 4 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 7 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] ( 22, 12.50)     ref  ->  rbx         this class-hnd single-def <System.Linq.Enumerable+AppendPrependN`1[System.Nullable`1[int]]>
 ;* V01 loc0         [V01    ] (  0,  0   )     int  ->  zero-ref   
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V03 tmp1         [V03    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[System.Nullable`1[int]]>
 ;* V04 tmp2         [V04    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[System.Nullable`1[int]]>
-;* V05 tmp3         [V05    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
-;  V06 tmp4         [V06,T03] (  2,  2   )     ref  ->  rdi         single-def "argument with side effect"
-;  V07 cse0         [V07,T02] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
-;  V08 cse1         [V08,T04] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
-;  V09 cse2         [V09,T05] (  3,  1.50)     ref  ->  rdi         "CSE #03: moderate"
-;  V10 rat0         [V10,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
+;  V05 tmp3         [V05,T05] (  3,  1.50)     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]>
+;  V06 tmp4         [V06,T03] (  3,  3   )     ref  ->  r15         class-hnd exact single-def "Inlining Arg" <System.Nullable`1[int][]>
+;* V07 tmp5         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Nullable`1[int][]>
+;  V08 tmp6         [V08,T08] (  3,  1.50)     int  ->  r14         "Inline stloc first use temp"
+;  V09 tmp7         [V09,T02] (  5,  5   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[System.Nullable`1[int]]>
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
+;  V11 cse0         [V11,T04] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
+;  V12 cse1         [V12,T06] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
+;  V13 cse2         [V13,T07] (  3,  1.50)     ref  ->  rdi         "CSE #04: moderate"
+;  V14 rat0         [V14,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 0
 
 G_M31813_IG01:
        push     rbp
        push     r15
+       push     r14
+       push     r13
        push     rbx
-       lea      rbp, [rsp+0x10]
+       lea      rbp, [rsp+0x20]
        mov      rbx, rdi
-						;; size=12 bbWeight=1 PerfScore 3.75
+						;; size=16 bbWeight=1 PerfScore 5.75
 G_M31813_IG02:
        mov      edi, dword ptr [rbx+0x0C]
        dec      edi
        cmp      edi, 3
        ja       SHORT G_M31813_IG04
 						;; size=10 bbWeight=1 PerfScore 3.50
 G_M31813_IG03:
        mov      edi, edi
        lea      rsi, [reloc @RWD00]
        mov      esi, dword ptr [rsi+4*rdi]
        lea      rax, G_M31813_IG02
        add      rsi, rax
        jmp      rsi
 						;; size=24 bbWeight=0.80 PerfScore 4.80
 G_M31813_IG04:
        mov      rdi, gword ptr [rbx+0x20]
        test     rdi, rdi
        je       SHORT G_M31813_IG05
        mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
        call     [r11]System.IDisposable:Dispose():this
        xor      rax, rax
        mov      gword ptr [rbx+0x20], rax
 						;; size=28 bbWeight=0.50 PerfScore 3.88
 G_M31813_IG05:
        xor      eax, eax
        mov      qword ptr [rbx+0x10], rax
        mov      dword ptr [rbx+0x0C], -1
 						;; size=13 bbWeight=0.50 PerfScore 1.12
 G_M31813_IG06:
        xor      eax, eax
 						;; size=2 bbWeight=0.50 PerfScore 0.12
 G_M31813_IG07:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
 G_M31813_IG08:
        mov      rsi, gword ptr [rbx+0x28]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 2
 						;; size=20 bbWeight=0.50 PerfScore 2.25
 G_M31813_IG09:
        mov      r15, gword ptr [rbx+0x38]
        test     r15, r15
-       jne      G_M31813_IG13
+       jne      G_M31813_IG16
        mov      rdi, gword ptr [rbx+0x18]
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[System.Nullable`1[int]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this
        call     [r11]System.Collections.Generic.IEnumerable`1[System.Nullable`1[int]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this
        lea      rdi, bword ptr [rbx+0x20]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 3
 						;; size=49 bbWeight=0.50 PerfScore 5.62
 G_M31813_IG10:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[System.Nullable`1[int]]:LoadFromEnumerator():ubyte:this
        call     [rax]System.Linq.Enumerable+AppendPrependIterator`1[System.Nullable`1[int]]:LoadFromEnumerator():ubyte:this
        test     eax, eax
-       jne      SHORT G_M31813_IG14
+       jne      G_M31813_IG17
        mov      rdi, gword ptr [rbx+0x30]
        test     rdi, rdi
        je       SHORT G_M31813_IG06
        mov      esi, dword ptr [rbx+0x44]
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.SingleLinkedNode`1[System.Nullable`1[int]]:ToArray(int):System.Nullable`1[int][]:this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Linq.SingleLinkedNode`1[System.Nullable`1[int]]:ToArray(int):System.Nullable`1[int][]:this
-       mov      rdi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[System.Nullable`1[int]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this
-       call     [r11]System.Collections.Generic.IEnumerable`1[System.Nullable`1[int]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Nullable`1[int]]:this
+       mov      r15, rax
+       mov      r14d, dword ptr [r15+0x08]
+       test     r14d, r14d
+       jne      SHORT G_M31813_IG12
+       mov      rdi, 0xD1FFAB1E      ; global ptr
+       test     byte  ptr [rdi], 1
+       je       G_M31813_IG19
+						;; size=80 bbWeight=0.50 PerfScore 12.00
+G_M31813_IG11:
+       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[System.Nullable`1[int]]:Empty
+       mov      rsi, gword ptr [rdi]
+       jmp      SHORT G_M31813_IG13
+						;; size=15 bbWeight=0.50 PerfScore 2.12
+G_M31813_IG12:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Nullable`1[int]]
+       call     CORINFO_HELP_NEWSFAST
+       mov      r13, rax
+       mov      dword ptr [r13+0x08], -1
+       mov      dword ptr [r13+0x0C], r14d
+       lea      rdi, bword ptr [r13+0x10]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      rsi, r13
+						;; size=45 bbWeight=0.50 PerfScore 2.75
+G_M31813_IG13:
        lea      rdi, bword ptr [rbx+0x20]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 4
-						;; size=80 bbWeight=0.50 PerfScore 11.25
-G_M31813_IG11:
+						;; size=16 bbWeight=0.50 PerfScore 1.25
+G_M31813_IG14:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[System.Nullable`1[int]]:LoadFromEnumerator():ubyte:this
 						;; size=13 bbWeight=0.50 PerfScore 0.25
-G_M31813_IG12:
+G_M31813_IG15:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        tail.jmp [rax]System.Linq.Enumerable+AppendPrependIterator`1[System.Nullable`1[int]]:LoadFromEnumerator():ubyte:this
-						;; size=7 bbWeight=0.50 PerfScore 1.75
-G_M31813_IG13:
+						;; size=11 bbWeight=0.50 PerfScore 2.25
+G_M31813_IG16:
        mov      rdi, qword ptr [r15+0x10]
        mov      qword ptr [rbx+0x10], rdi
        mov      rsi, gword ptr [r15+0x08]
        lea      rdi, bword ptr [rbx+0x38]
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=21 bbWeight=0.50 PerfScore 3.25
-G_M31813_IG14:
+G_M31813_IG17:
        mov      eax, 1
 						;; size=5 bbWeight=0.50 PerfScore 0.12
-G_M31813_IG15:
+G_M31813_IG18:
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
+						;; size=9 bbWeight=0.50 PerfScore 1.75
+G_M31813_IG19:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Nullable`1[int]]
+       call     CORINFO_HELP_GET_GCSTATIC_BASE
+       jmp      G_M31813_IG11
+						;; size=20 bbWeight=0 PerfScore 0.00
 RWD00  	dd	G_M31813_IG08 - G_M31813_IG02
        	dd	G_M31813_IG09 - G_M31813_IG02
        	dd	G_M31813_IG10 - G_M31813_IG02
-       	dd	G_M31813_IG11 - G_M31813_IG02
+       	dd	G_M31813_IG14 - G_M31813_IG02
 
 
-; Total bytes of code 294, prolog size 12, PerfScore 44.17, instruction count 79, allocated bytes for code 294 (MethodHash=c22e83ba) for method System.Linq.Enumerable+AppendPrependN`1[System.Nullable`1[int]]:MoveNext():ubyte:this (FullOpts)
+; Total bytes of code 406, prolog size 16, PerfScore 54.55, instruction count 105, allocated bytes for code 406 (MethodHash=c22e83ba) for method System.Linq.Enumerable+AppendPrependN`1[System.Nullable`1[int]]:MoveNext():ubyte:this (FullOpts)
 ; ============================================================

112 (36.25 % of base) - System.Linq.Enumerable+AppendPrependN`1[System.Numerics.Vector`1[float]]:MoveNext():ubyte:this

 ; Assembly listing for method System.Linq.Enumerable+AppendPrependN`1[System.Numerics.Vector`1[float]]:MoveNext():ubyte:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 4 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 7 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] ( 22, 12.50)     ref  ->  rbx         this class-hnd single-def <System.Linq.Enumerable+AppendPrependN`1[System.Numerics.Vector`1[float]]>
 ;* V01 loc0         [V01    ] (  0,  0   )     int  ->  zero-ref   
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V03 tmp1         [V03    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[System.Numerics.Vector`1[float]]>
 ;* V04 tmp2         [V04    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Linq.SingleLinkedNode`1[System.Numerics.Vector`1[float]]>
-;* V05 tmp3         [V05    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
-;  V06 tmp4         [V06,T03] (  2,  2   )     ref  ->  rdi         single-def "argument with side effect"
-;  V07 cse0         [V07,T02] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
-;  V08 cse1         [V08,T04] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
-;  V09 cse2         [V09,T05] (  3,  1.50)     ref  ->  rdi         "CSE #03: moderate"
-;  V10 rat0         [V10,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
+;  V05 tmp3         [V05,T05] (  3,  1.50)     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]>
+;  V06 tmp4         [V06,T03] (  3,  3   )     ref  ->  r15         class-hnd exact single-def "Inlining Arg" <System.Numerics.Vector`1[float][]>
+;* V07 tmp5         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Numerics.Vector`1[float][]>
+;  V08 tmp6         [V08,T08] (  3,  1.50)     int  ->  r14         "Inline stloc first use temp"
+;  V09 tmp7         [V09,T02] (  5,  5   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[System.Numerics.Vector`1[float]]>
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "Single return block return value"
+;  V11 cse0         [V11,T04] (  4,  2   )     ref  ->  r15         "CSE #01: aggressive"
+;  V12 cse1         [V12,T06] (  3,  1.50)     ref  ->  rdi         "CSE #02: moderate"
+;  V13 cse2         [V13,T07] (  3,  1.50)     ref  ->  rdi         "CSE #04: moderate"
+;  V14 rat0         [V14,T01] (  3,  5.60)     int  ->  rdi         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 0
 
 G_M3352_IG01:
        push     rbp
        push     r15
+       push     r14
+       push     r13
        push     rbx
-       lea      rbp, [rsp+0x10]
+       lea      rbp, [rsp+0x20]
        mov      rbx, rdi
-						;; size=12 bbWeight=1 PerfScore 3.75
+						;; size=16 bbWeight=1 PerfScore 5.75
 G_M3352_IG02:
        mov      edi, dword ptr [rbx+0x0C]
        dec      edi
        cmp      edi, 3
        ja       SHORT G_M3352_IG04
 						;; size=10 bbWeight=1 PerfScore 3.50
 G_M3352_IG03:
        mov      edi, edi
        lea      rsi, [reloc @RWD00]
        mov      esi, dword ptr [rsi+4*rdi]
        lea      rax, G_M3352_IG02
        add      rsi, rax
        jmp      rsi
 						;; size=24 bbWeight=0.80 PerfScore 4.80
 G_M3352_IG04:
        mov      rdi, gword ptr [rbx+0x38]
        test     rdi, rdi
        je       SHORT G_M3352_IG05
        mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
        call     [r11]System.IDisposable:Dispose():this
        xor      rax, rax
        mov      gword ptr [rbx+0x38], rax
 						;; size=28 bbWeight=0.50 PerfScore 3.88
 G_M3352_IG05:
        vxorps   ymm0, ymm0, ymm0
        vmovups  ymmword ptr [rbx+0x10], ymm0
        mov      dword ptr [rbx+0x0C], -1
 						;; size=16 bbWeight=0.50 PerfScore 1.67
 G_M3352_IG06:
        xor      eax, eax
 						;; size=2 bbWeight=0.50 PerfScore 0.12
 G_M3352_IG07:
        vzeroupper 
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=8 bbWeight=0.50 PerfScore 1.75
+						;; size=12 bbWeight=0.50 PerfScore 2.25
 G_M3352_IG08:
        mov      rsi, gword ptr [rbx+0x40]
        lea      rdi, bword ptr [rbx+0x50]
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 2
 						;; size=20 bbWeight=0.50 PerfScore 2.25
 G_M3352_IG09:
        mov      r15, gword ptr [rbx+0x50]
        test     r15, r15
-       jne      G_M3352_IG13
+       jne      G_M3352_IG16
        mov      rdi, gword ptr [rbx+0x30]
        mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[System.Numerics.Vector`1[float]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this
        call     [r11]System.Collections.Generic.IEnumerable`1[System.Numerics.Vector`1[float]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this
        lea      rdi, bword ptr [rbx+0x38]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 3
 						;; size=49 bbWeight=0.50 PerfScore 5.62
 G_M3352_IG10:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[System.Numerics.Vector`1[float]]:LoadFromEnumerator():ubyte:this
        call     [rax]System.Linq.Enumerable+AppendPrependIterator`1[System.Numerics.Vector`1[float]]:LoadFromEnumerator():ubyte:this
        test     eax, eax
-       jne      SHORT G_M3352_IG14
+       jne      G_M3352_IG17
        mov      rdi, gword ptr [rbx+0x48]
        test     rdi, rdi
        je       SHORT G_M3352_IG06
        mov      esi, dword ptr [rbx+0x5C]
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.SingleLinkedNode`1[System.Numerics.Vector`1[float]]:ToArray(int):System.Numerics.Vector`1[float][]:this
        cmp      dword ptr [rdi], edi
        call     [rax]System.Linq.SingleLinkedNode`1[System.Numerics.Vector`1[float]]:ToArray(int):System.Numerics.Vector`1[float][]:this
-       mov      rdi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[System.Numerics.Vector`1[float]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this
-       call     [r11]System.Collections.Generic.IEnumerable`1[System.Numerics.Vector`1[float]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Numerics.Vector`1[float]]:this
+       mov      r15, rax
+       mov      r14d, dword ptr [r15+0x08]
+       test     r14d, r14d
+       jne      SHORT G_M3352_IG12
+       mov      rdi, 0xD1FFAB1E      ; global ptr
+       test     byte  ptr [rdi], 1
+       je       G_M3352_IG19
+						;; size=80 bbWeight=0.50 PerfScore 12.00
+G_M3352_IG11:
+       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[System.Numerics.Vector`1[float]]:Empty
+       mov      rsi, gword ptr [rdi]
+       jmp      SHORT G_M3352_IG13
+						;; size=15 bbWeight=0.50 PerfScore 2.12
+G_M3352_IG12:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Numerics.Vector`1[float]]
+       call     CORINFO_HELP_NEWSFAST
+       mov      r13, rax
+       mov      dword ptr [r13+0x08], -1
+       mov      dword ptr [r13+0x0C], r14d
+       lea      rdi, bword ptr [r13+0x10]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      rsi, r13
+						;; size=45 bbWeight=0.50 PerfScore 2.75
+G_M3352_IG13:
        lea      rdi, bword ptr [rbx+0x38]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x0C], 4
-						;; size=80 bbWeight=0.50 PerfScore 11.25
-G_M3352_IG11:
+						;; size=16 bbWeight=0.50 PerfScore 1.25
+G_M3352_IG14:
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+AppendPrependIterator`1[System.Numerics.Vector`1[float]]:LoadFromEnumerator():ubyte:this
 						;; size=13 bbWeight=0.50 PerfScore 0.25
-G_M3352_IG12:
+G_M3352_IG15:
        vzeroupper 
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        tail.jmp [rax]System.Linq.Enumerable+AppendPrependIterator`1[System.Numerics.Vector`1[float]]:LoadFromEnumerator():ubyte:this
-						;; size=10 bbWeight=0.50 PerfScore 2.25
-G_M3352_IG13:
+						;; size=14 bbWeight=0.50 PerfScore 2.75
+G_M3352_IG16:
        vmovups  ymm0, ymmword ptr [r15+0x10]
        vmovups  ymmword ptr [rbx+0x10], ymm0
        mov      rsi, gword ptr [r15+0x08]
        lea      rdi, bword ptr [rbx+0x50]
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=24 bbWeight=0.50 PerfScore 5.25
-G_M3352_IG14:
+G_M3352_IG17:
        mov      eax, 1
 						;; size=5 bbWeight=0.50 PerfScore 0.12
-G_M3352_IG15:
+G_M3352_IG18:
        vzeroupper 
        pop      rbx
+       pop      r13
+       pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=8 bbWeight=0.50 PerfScore 1.75
+						;; size=12 bbWeight=0.50 PerfScore 2.25
+G_M3352_IG19:
+       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Numerics.Vector`1[float]]
+       call     CORINFO_HELP_GET_GCSTATIC_BASE
+       jmp      G_M3352_IG11
+						;; size=20 bbWeight=0 PerfScore 0.00
 RWD00  	dd	G_M3352_IG08 - G_M3352_IG02
        	dd	G_M3352_IG09 - G_M3352_IG02
        	dd	G_M3352_IG10 - G_M3352_IG02
-       	dd	G_M3352_IG11 - G_M3352_IG02
+       	dd	G_M3352_IG14 - G_M3352_IG02
 
 
-; Total bytes of code 309, prolog size 12, PerfScore 48.22, instruction count 82, allocated bytes for code 309 (MethodHash=b5bdf2e7) for method System.Linq.Enumerable+AppendPrependN`1[System.Numerics.Vector`1[float]]:MoveNext():ubyte:this (FullOpts)
+; Total bytes of code 421, prolog size 16, PerfScore 58.59, instruction count 108, allocated bytes for code 421 (MethodHash=b5bdf2e7) for method System.Linq.Enumerable+AppendPrependN`1[System.Numerics.Vector`1[float]]:MoveNext():ubyte:this (FullOpts)
 ; ============================================================

Larger list of diffs: https://gist.github.com/MihuBot/7f90a1a34c0e5bf823f653b705b6a879

[MihuBot]

Top method improvements

-35 (-1.68 % of base) - System.Runtime.Serialization.DataContracts.EnumDataContract+EnumDataContractCriticalHelper:ImportDataMembers():this

 ; Assembly listing for method System.Runtime.Serialization.DataContracts.EnumDataContract+EnumDataContractCriticalHelper:ImportDataMembers():this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 35 single block inlinees; 9 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T09] ( 12, 15   )     ref  ->  rbx         this class-hnd single-def <System.Runtime.Serialization.DataContracts.EnumDataContract+EnumDataContractCriticalHelper>
 ;  V01 loc0         [V01,T51] (  4,  3   )     ref  ->  r15         class-hnd single-def <System.Type>
 ;  V02 loc1         [V02,T12] (  6, 12   )     ref  ->  r14         class-hnd single-def <System.Reflection.FieldInfo[]>
 ;  V03 loc2         [V03,T49] (  3,  5   )     ref  ->  r13         class-hnd exact single-def <System.Collections.Generic.Dictionary`2[System.String,System.Runtime.Serialization.DataContracts.DataMember]>
 ;  V04 loc3         [V04,T31] (  4,  6   )     ref  ->  r12         class-hnd exact single-def <System.Collections.Generic.List`1[System.Runtime.Serialization.DataContracts.DataMember]>
 ;  V05 loc4         [V05,T01] ( 14, 26   )     ref  ->  [rbp-0x50]  class-hnd exact spill-single-def <System.Collections.Generic.List`1[long]>
 ;* V06 loc5         [V06,T52] (  0,  0   )     int  ->  zero-ref   
 ;  V07 loc6         [V07,T00] ( 21, 34   )     ref  ->  [rbp-0x58]  class-hnd spill-single-def <System.Reflection.FieldInfo>
 ;  V08 loc7         [V08,T24] (  3,  8   )   ubyte  ->  [rbp-0x2C] 
 ;* V09 loc8         [V09    ] (  0,  0   )     ref  ->  zero-ref    class-hnd <System.Object[]>
 ;* V10 loc9         [V10    ] (  0,  0   )     ref  ->  zero-ref    class-hnd <System.Object[]>
 ;  V11 loc10        [V11,T32] (  3,  6   )     ref  ->  [rbp-0x60]  class-hnd exact spill-single-def <System.Runtime.Serialization.EnumMemberAttribute>
 ;* V12 loc11        [V12    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact <System.Runtime.Serialization.DataContracts.DataMember>
 ;* V13 loc12        [V13    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact <System.Runtime.Serialization.DataContracts.DataMember>
 ;  V14 loc13        [V14,T15] (  5, 10   )     ref  ->  rax         class-hnd <System.Object>
 ;# V15 OutArgs      [V15    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;  V16 tmp1         [V16,T33] (  3,  6   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Dictionary`2[System.String,System.Runtime.Serialization.DataContracts.DataMember]>
 ;  V17 tmp2         [V17,T34] (  3,  6   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.List`1[System.Runtime.Serialization.DataContracts.DataMember]>
 ;  V18 tmp3         [V18,T35] (  3,  6   )     ref  ->  [rbp-0x68]  class-hnd exact spill-single-def "NewObj constructor temp" <System.Collections.Generic.List`1[long]>
 ;  V19 tmp4         [V19,T04] (  5, 20   )     ref  ->  [rbp-0x70]  class-hnd exact spill-single-def "NewObj constructor temp" <System.Runtime.Serialization.DataContracts.DataMember>
 ;* V20 tmp5         [V20    ] (  0,  0   )     ref  ->  zero-ref   
 ;* V21 tmp6         [V21    ] (  0,  0   )     ref  ->  zero-ref   
 ;  V22 tmp7         [V22,T43] (  3,  6   )    long  ->  rax        
 ;* V23 tmp8         [V23    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "non-inline candidate call" <System.String>
 ;* V24 tmp9         [V24    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "non-inline candidate call" <System.String>
 ;  V25 tmp10        [V25,T03] (  6, 24   )     ref  ->  [rbp-0x78]  class-hnd exact spill-single-def "NewObj constructor temp" <System.Runtime.Serialization.DataContracts.DataMember>
 ;* V26 tmp11        [V26    ] (  0,  0   )     ref  ->  zero-ref   
 ;* V27 tmp12        [V27    ] (  0,  0   )     ref  ->  zero-ref   
 ;  V28 tmp13        [V28,T44] (  3,  6   )    long  ->  rax        
 ;* V29 tmp14        [V29    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "non-inline candidate call" <System.String>
 ;* V30 tmp15        [V30    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "non-inline candidate call" <System.String>
 ;* V31 tmp16        [V31    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "non-inline candidate call" <System.String>
 ;* V32 tmp17        [V32    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "non-inline candidate call" <System.String>
 ;  V33 tmp18        [V33,T13] (  6, 12   )     ref  ->  rax         class-hnd "Inline return value spill temp" <System.Object[]>
 ;  V34 tmp19        [V34,T05] (  5, 20   )     ref  ->  [rbp-0x80]  class-hnd spill-single-def "Inlining Arg" <System.Object[]>
 ;  V35 tmp20        [V35,T17] (  4,  8   )     ref  ->  rax         class-hnd "Inline stloc first use temp" <System.Linq.Enumerable+Iterator`1[System.Object]>
 ;* V36 tmp21        [V36    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.Object[]>
 ;  V37 tmp22        [V37,T36] (  3,  6   )     ref  ->  rax         class-hnd "Inline return value spill temp" <System.Object[]>
 ;  V38 tmp23        [V38,T45] (  3,  6   )     int  ->  rax         "Inline stloc first use temp"
 ;  V39 tmp24        [V39,T37] (  3,  6   )     ref  ->  [rbp-0x88]  class-hnd exact spill-single-def "Inline stloc first use temp" <System.Object[]>
 ;* V40 tmp25        [V40    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.String>
 ;  V41 tmp26        [V41,T06] (  5, 20   )     ref  ->  [rbp-0x90]  class-hnd exact spill-single-def "NewObj constructor temp" <System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper>
 ;* V42 tmp27        [V42,T65] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;  V43 tmp28        [V43,T14] (  3, 12   )     ref  ->  rdi         class-hnd exact "Inlining Arg" <System.String>
 ;* V44 tmp29        [V44    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.String>
 ;* V45 tmp30        [V45    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.String>
 ;* V46 tmp31        [V46    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper>
 ;  V47 tmp32        [V47,T25] (  2,  8   )     ref  ->  rax         class-hnd exact "Inlining Arg" <System.String>
 ;* V48 tmp33        [V48    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper>
 ;* V49 tmp34        [V49    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper>
 ;  V50 tmp35        [V50,T16] (  5, 10   )     ref  ->  rax         class-hnd "Inline return value spill temp" <System.Object[]>
 ;  V51 tmp36        [V51,T07] (  5, 20   )     ref  ->  [rbp-0x98]  class-hnd spill-single-def "Inlining Arg" <System.Object[]>
 ;  V52 tmp37        [V52,T18] (  4,  8   )     ref  ->  rax         class-hnd "Inline stloc first use temp" <System.Linq.Enumerable+Iterator`1[System.Object]>
 ;* V53 tmp38        [V53    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.Object[]>
 ;  V54 tmp39        [V54,T38] (  3,  6   )     ref  ->  rax         class-hnd "Inline return value spill temp" <System.Object[]>
 ;  V55 tmp40        [V55,T46] (  3,  6   )     int  ->  rax         "Inline stloc first use temp"
 ;  V56 tmp41        [V56,T39] (  3,  6   )     ref  ->  [rbp-0xA0]  class-hnd exact spill-single-def "Inline stloc first use temp" <System.Object[]>
 ;* V57 tmp42        [V57    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.String>
 ;  V58 tmp43        [V58,T08] (  5, 20   )     ref  ->  [rbp-0xA8]  class-hnd exact spill-single-def "NewObj constructor temp" <System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper>
 ;  V59 tmp44        [V59,T26] (  2,  8   )     ref  ->  rax         class-hnd exact "Inlining Arg" <System.String>
 ;* V60 tmp45        [V60    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper>
 ;* V61 tmp46        [V61    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper>
 ;  V62 tmp47        [V62,T19] (  4,  8   )    long  ->  rsi         "Inline return value spill temp"
 ;  V63 tmp48        [V63,T40] (  3,  6   )     ref  ->  rcx         class-hnd "Inline stloc first use temp" <long[]>
 ;  V64 tmp49        [V64,T20] (  4,  8   )     int  ->  rdx         "Inline stloc first use temp"
 ;  V65 tmp50        [V65,T21] (  4,  8   )    long  ->  rsi         "Inline return value spill temp"
 ;  V66 tmp51        [V66,T41] (  3,  6   )     ref  ->  rcx         class-hnd "Inline stloc first use temp" <long[]>
 ;  V67 tmp52        [V67,T22] (  4,  8   )     int  ->  rdx         "Inline stloc first use temp"
 ;  V68 tmp53        [V68,T27] (  2,  8   )     ref  ->  rsi         "argument with side effect"
 ;  V69 tmp54        [V69,T53] (  2,  0   )     ref  ->  r15         "argument with side effect"
 ;  V70 tmp55        [V70,T54] (  2,  0   )     ref  ->  r13         "argument with side effect"
 ;  V71 tmp56        [V71,T55] (  2,  0   )     ref  ->  rdx         "argument with side effect"
 ;  V72 tmp57        [V72,T56] (  2,  0   )     ref  ->  rdi         "argument with side effect"
 ;  V73 tmp58        [V73,T57] (  2,  0   )     ref  ->  r13         "argument with side effect"
 ;  V74 tmp59        [V74,T58] (  2,  0   )     ref  ->  r14         "argument with side effect"
 ;  V75 tmp60        [V75,T59] (  2,  0   )     ref  ->  rdx         "argument with side effect"
 ;  V76 tmp61        [V76,T60] (  2,  0   )     ref  ->  rdi         "argument with side effect"
 ;  V77 tmp62        [V77,T28] (  2,  8   )     ref  ->  rsi         "argument with side effect"
 ;  V78 tmp63        [V78,T61] (  2,  0   )     ref  ->  r15         "argument with side effect"
 ;  V79 tmp64        [V79,T62] (  2,  0   )     ref  ->  r13         "argument with side effect"
 ;  V80 tmp65        [V80,T63] (  2,  0   )     ref  ->  rdx         "argument with side effect"
 ;  V81 tmp66        [V81,T64] (  2,  0   )     ref  ->  rdi         "argument with side effect"
 ;  V82 tmp67        [V82,T29] (  2,  8   )     ref  ->  rdi         "argument with side effect"
 ;  V83 tmp68        [V83,T30] (  2,  8   )     ref  ->  rdi         "argument with side effect"
 ;  V84 cse0         [V84,T47] (  3,  6   )    long  ->  [rbp-0x38]  spill-single-def "CSE #07: conservative"
 ;  V85 cse1         [V85,T42] (  3,  6   )     ref  ->  rsi         "CSE #03: conservative"
 ;  V86 cse2         [V86,T02] ( 17, 24   )    long  ->  [rbp-0x40]  multi-def "CSE #04: aggressive"
 ;  V87 cse3         [V87,T48] (  3,  6   )     int  ->  rdi         "CSE #02: moderate"
 ;  V88 rat0         [V88,T10] (  5, 17   )    long  ->  [rbp-0x48]  "Widened IV V06"
 ;  V89 rat1         [V89,T23] (  3,  8   )     ref  ->  rsi         "Spilling to split statement for tree"
 ;  V90 rat2         [V90,T11] (  4, 14   )     ref  ->  rax         "replacement local"
 ;  V91 rat3         [V91,T50] (  3,  4   )    long  ->  rdi         "CSE for expectedClsNode"
 ;
 ; Lcl frame size = 136
 
 G_M60243_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 136
        lea      rbp, [rsp+0xB0]
        mov      rbx, rdi
 						;; size=28 bbWeight=1 PerfScore 7.00
 G_M60243_IG02:
        mov      r15, gword ptr [rbx+0x08]
        mov      rdi, r15
        mov      esi, 24
        mov      rax, qword ptr [r15]
        mov      rax, qword ptr [rax+0x80]
        call     [rax+0x28]System.Type:GetFields(int):System.Reflection.FieldInfo[]:this
        mov      r14, rax
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.Dictionary`2[System.String,System.Runtime.Serialization.DataContracts.DataMember]
        call     CORINFO_HELP_NEWSFAST
        mov      r13, rax
        mov      rdi, r13
        xor      esi, esi
        xor      rdx, rdx
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.Dictionary`2[System.__Canon,System.__Canon]:.ctor(int,System.Collections.Generic.IEqualityComparer`1[System.__Canon]):this
        call     [rax]System.Collections.Generic.Dictionary`2[System.__Canon,System.__Canon]:.ctor(int,System.Collections.Generic.IEqualityComparer`1[System.__Canon]):this
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.List`1[System.Runtime.Serialization.DataContracts.DataMember]
        call     CORINFO_HELP_NEWSFAST
        mov      r12, rax
        mov      esi, dword ptr [r14+0x08]
        mov      rdi, r12
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[System.__Canon]:.ctor(int):this
        call     [rax]System.Collections.Generic.List`1[System.__Canon]:.ctor(int):this
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.List`1[long]
        call     CORINFO_HELP_NEWSFAST
        mov      gword ptr [rbp-0x68], rax
        mov      esi, dword ptr [r14+0x08]
        mov      rdi, rax
        mov      rcx, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[long]:.ctor(int):this
        call     [rcx]System.Collections.Generic.List`1[long]:.ctor(int):this
        mov      rax, gword ptr [rbp-0x68]
        mov      gword ptr [rbp-0x50], rax
        xor      ecx, ecx
        cmp      dword ptr [r14+0x08], 0
        jle      G_M60243_IG38
 						;; size=161 bbWeight=1 PerfScore 36.25
 G_M60243_IG03:
        mov      qword ptr [rbp-0x48], rcx
        mov      rdx, gword ptr [r14+8*rcx+0x10]
        mov      gword ptr [rbp-0x58], rdx
        xor      esi, esi
        mov      dword ptr [rbp-0x2C], esi
        cmp      byte  ptr [rbx+0x4E], 0
        jne      G_M60243_IG09
 						;; size=28 bbWeight=4 PerfScore 37.00
 G_M60243_IG04:
        mov      rdi, rdx
        mov      r8, qword ptr [rdx]
        mov      qword ptr [rbp-0x40], r8
        mov      rsi, qword ptr [r8+0x50]
        call     [rsi+0x10]System.Reflection.FieldInfo:get_Attributes():int:this
        test     al, 128
        jne      G_M60243_IG37
        mov      rdi, 0xD1FFAB1E      ; System.Runtime.Serialization.DataContracts.DataMember
        call     CORINFO_HELP_NEWSFAST
        mov      gword ptr [rbp-0x70], rax
        mov      rdi, 0xD1FFAB1E      ; System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper
        call     CORINFO_HELP_NEWSFAST
        mov      gword ptr [rbp-0xA8], rax
        mov      byte  ptr [rax+0x41], 1
        lea      rdi, bword ptr [rax+0x18]
        mov      rsi, gword ptr [rbp-0x58]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rdi, 0xD1FFAB1E      ; const ptr
        mov      rsi, gword ptr [rdi]
        mov      rax, gword ptr [rbp-0xA8]
        lea      rdi, bword ptr [rax+0x30]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rax, gword ptr [rbp-0x70]
        lea      rdi, bword ptr [rax+0x08]
        mov      rsi, gword ptr [rbp-0xA8]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rdi, gword ptr [rbp-0x58]
        mov      rax, qword ptr [rbp-0x40]
        mov      rcx, qword ptr [rax+0x40]
        call     [rcx+0x30]System.Reflection.MemberInfo:get_Name():System.String:this
        mov      rcx, gword ptr [rbp-0x70]
        mov      rdi, gword ptr [rcx+0x08]
        lea      rdi, bword ptr [rdi+0x10]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        cmp      byte  ptr [rbx+0x4C], 0
        je       SHORT G_M60243_IG06
        mov      rdi, gword ptr [rbp-0x58]
        xor      rsi, rsi
        mov      rax, qword ptr [rbp-0x40]
        mov      rax, qword ptr [rax+0x58]
 						;; size=187 bbWeight=2 PerfScore 91.50
 G_M60243_IG05:
        call     [rax]System.Reflection.FieldInfo:GetValue(System.Object):System.Object:this
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Convert:ToUInt64(System.Object):ulong
        call     [rax]System.Convert:ToUInt64(System.Object):ulong
        jmp      SHORT G_M60243_IG07
 						;; size=19 bbWeight=2 PerfScore 17.00
 G_M60243_IG06:
        mov      rdi, gword ptr [rbp-0x58]
        xor      rsi, rsi
        mov      rcx, qword ptr [rbp-0x40]
        mov      rax, qword ptr [rcx+0x58]
        call     [rax]System.Reflection.FieldInfo:GetValue(System.Object):System.Object:this
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Convert:ToInt64(System.Object):long
        call     [rax]System.Convert:ToInt64(System.Object):long
 						;; size=31 bbWeight=2 PerfScore 21.50
 G_M60243_IG07:
        mov      rsi, gword ptr [rbp-0x70]
        mov      rdi, gword ptr [rsi+0x08]
        mov      qword ptr [rdi+0x38], rax
        mov      rdi, r12
        mov      rdx, r13
        mov      rax, 0xD1FFAB1E      ; code for System.Runtime.Serialization.DataContracts.ClassDataContract:CheckAndAddMember(System.Collections.Generic.List`1[System.Runtime.Serialization.DataContracts.DataMember],System.Runtime.Serialization.DataContracts.DataMember,System.Collections.Generic.Dictionary`2[System.String,System.Runtime.Serialization.DataContracts.DataMember])
        call     [rax]System.Runtime.Serialization.DataContracts.ClassDataContract:CheckAndAddMember(System.Collections.Generic.List`1[System.Runtime.Serialization.DataContracts.DataMember],System.Runtime.Serialization.DataContracts.DataMember,System.Collections.Generic.Dictionary`2[System.String,System.Runtime.Serialization.DataContracts.DataMember])
 						;; size=30 bbWeight=2 PerfScore 15.50
 G_M60243_IG08:
        mov      rdi, gword ptr [rbp-0x58]
        xor      rsi, rsi
        mov      rcx, qword ptr [rdi]
        mov      rax, rcx
        mov      rax, qword ptr [rax+0x58]
        call     [rax]System.Reflection.FieldInfo:GetValue(System.Object):System.Object:this
        cmp      byte  ptr [rbx+0x4C], 0
        je       G_M60243_IG30
        test     rax, rax
        je       G_M60243_IG34
        mov      rsi, rax
        mov      rdi, 0xD1FFAB1E      ; System.IConvertible
        mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_CHKCASTINTERFACE
        call     [rax]CORINFO_HELP_CHKCASTINTERFACE
        mov      rdi, rax
        mov      r11, 0xD1FFAB1E      ; code for System.IConvertible:ToUInt64(System.IFormatProvider):ulong:this
        xor      rsi, rsi
        call     [r11]System.IConvertible:ToUInt64(System.IFormatProvider):ulong:this
        mov      rsi, rax
        jmp      G_M60243_IG35
 						;; size=88 bbWeight=2 PerfScore 47.00
 G_M60243_IG09:
        mov      rdi, 0xD1FFAB1E      ; code for System.Runtime.Serialization.Globals:get_TypeOfEnumMemberAttribute():System.Type
        call     [rdi]System.Runtime.Serialization.Globals:get_TypeOfEnumMemberAttribute():System.Type
        mov      rsi, rax
        mov      rdi, gword ptr [rbp-0x58]
        xor      edx, edx
        mov      rcx, qword ptr [rdi]
        mov      rax, rcx
        mov      qword ptr [rbp-0x40], rax
        mov      rcx, qword ptr [rax+0x48]
        mov      qword ptr [rbp-0x38], rcx
        call     [rcx+0x28]System.Reflection.MemberInfo:GetCustomAttributes(System.Type,ubyte):System.Object[]:this
        mov      gword ptr [rbp-0x80], rax
        mov      rsi, rax
        mov      rdi, 0xD1FFAB1E      ; System.Linq.Enumerable+Iterator`1[System.Object]
        mov      rcx, 0xD1FFAB1E      ; code for CORINFO_HELP_ISINSTANCEOFCLASS
        call     [rcx]CORINFO_HELP_ISINSTANCEOFCLASS
        test     rax, rax
        jne      G_M60243_IG14
        mov      rax, gword ptr [rbp-0x80]
        test     rax, rax
        jne      SHORT G_M60243_IG10
        mov      rdi, 0xD1FFAB1E      ; System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.Object](System.Collections.Generic.IEnumerable`1[System.Object]):System.Object[]
        xor      rsi, rsi
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.__Canon](System.Collections.Generic.IEnumerable`1[System.__Canon]):System.__Canon[]
        call     [rax]System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.__Canon](System.Collections.Generic.IEnumerable`1[System.__Canon]):System.__Canon[]
        jmp      SHORT G_M60243_IG15
 						;; size=115 bbWeight=2 PerfScore 56.00
 G_M60243_IG10:
        mov      rdi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.ICollection`1[System.__Canon]:get_Count():int:this
-       call     [r11]System.Collections.Generic.ICollection`1[System.__Canon]:get_Count():int:this
+       call     System.SZArrayHelper:get_Count[System.Object]():int:this
        test     eax, eax
        jne      SHORT G_M60243_IG12
        mov      rdi, 0xD1FFAB1E      ; global ptr
        test     byte  ptr [rdi], 1
        je       G_M60243_IG40
-						;; size=39 bbWeight=2 PerfScore 18.00
+						;; size=31 bbWeight=2 PerfScore 13.50
 G_M60243_IG11:
        mov      rsi, 0xD1FFAB1E      ; data for System.Array+EmptyArray`1[System.Object]:Value
        mov      rax, gword ptr [rsi]
        jmp      SHORT G_M60243_IG13
 						;; size=15 bbWeight=2 PerfScore 8.50
 G_M60243_IG12:
        movsxd   rsi, eax
        mov      rdi, 0xD1FFAB1E      ; System.Object[]
        call     CORINFO_HELP_NEWARR_1_OBJ
        mov      gword ptr [rbp-0x88], rax
        mov      rdi, gword ptr [rbp-0x80]
        mov      rsi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.ICollection`1[System.__Canon]:CopyTo(System.__Canon[],int):this
        xor      edx, edx
-       call     [r11]System.Collections.Generic.ICollection`1[System.__Canon]:CopyTo(System.__Canon[],int):this
+       call     System.SZArrayHelper:CopyTo[System.Object](System.Object[],int):this
        mov      rax, gword ptr [rbp-0x88]
-						;; size=54 bbWeight=2 PerfScore 16.50
+						;; size=46 bbWeight=2 PerfScore 12.00
 G_M60243_IG13:
        jmp      SHORT G_M60243_IG15
 						;; size=2 bbWeight=2 PerfScore 4.00
 G_M60243_IG14:
        mov      rdi, rax
        mov      rax, qword ptr [rax]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x20]System.Linq.Enumerable+Iterator`1[System.__Canon]:ToArray():System.__Canon[]:this
 						;; size=13 bbWeight=2 PerfScore 14.50
 G_M60243_IG15:
        test     rax, rax
        je       G_M60243_IG22
        mov      edi, dword ptr [rax+0x08]
        test     edi, edi
        je       G_M60243_IG22
        cmp      edi, 1
        jg       G_M60243_IG45
        mov      rsi, gword ptr [rax+0x10]
        mov      rax, rsi
        test     rax, rax
        je       SHORT G_M60243_IG17
 						;; size=41 bbWeight=2 PerfScore 18.50
 G_M60243_IG16:
        mov      rdi, 0xD1FFAB1E      ; System.Runtime.Serialization.EnumMemberAttribute
        cmp      qword ptr [rax], rdi
        jne      G_M60243_IG44
 						;; size=19 bbWeight=1 PerfScore 4.25
 G_M60243_IG17:
        mov      gword ptr [rbp-0x60], rax
        mov      rdi, 0xD1FFAB1E      ; System.Runtime.Serialization.DataContracts.DataMember
        call     CORINFO_HELP_NEWSFAST
        mov      gword ptr [rbp-0x78], rax
        mov      rdi, 0xD1FFAB1E      ; System.Runtime.Serialization.DataContracts.DataMember+CriticalHelper
        call     CORINFO_HELP_NEWSFAST
        mov      gword ptr [rbp-0x90], rax
        mov      byte  ptr [rax+0x41], 1
        lea      rdi, bword ptr [rax+0x18]
        mov      rsi, gword ptr [rbp-0x58]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rdi, 0xD1FFAB1E      ; const ptr
        mov      rsi, gword ptr [rdi]
        mov      rax, gword ptr [rbp-0x90]
        lea      rdi, bword ptr [rax+0x30]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rax, gword ptr [rbp-0x78]
        lea      rdi, bword ptr [rax+0x08]
        mov      rsi, gword ptr [rbp-0x90]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rax, gword ptr [rbp-0x60]
        cmp      byte  ptr [rax+0x10], 0
        jne      SHORT G_M60243_IG18
        mov      rdi, gword ptr [rbp-0x58]
        mov      rcx, qword ptr [rbp-0x40]
        mov      rax, qword ptr [rcx+0x40]
        call     [rax+0x30]System.Reflection.MemberInfo:get_Name():System.String:this
        mov      rcx, gword ptr [rbp-0x78]
        mov      rdi, gword ptr [rcx+0x08]
        lea      rdi, bword ptr [rdi+0x10]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        jmp      SHORT G_M60243_IG19
 						;; size=158 bbWeight=2 PerfScore 72.00
 G_M60243_IG18:
        mov      rsi, gword ptr [rax+0x08]
        mov      rdi, rsi
        test     rdi, rdi
        je       G_M60243_IG43
        cmp      dword ptr [rdi+0x08], 0
        je       G_M60243_IG43
        mov      rax, gword ptr [rbp-0x78]
        mov      rdi, gword ptr [rax+0x08]
        lea      rdi, bword ptr [rdi+0x10]
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=43 bbWeight=2 PerfScore 24.00
 G_M60243_IG19:
        cmp      byte  ptr [rbx+0x4C], 0
        je       SHORT G_M60243_IG20
        mov      rdi, gword ptr [rbp-0x58]
        xor      rsi, rsi
        mov      rax, qword ptr [rbp-0x40]
        mov      rcx, qword ptr [rax+0x58]
        call     [rcx]System.Reflection.FieldInfo:GetValue(System.Object):System.Object:this
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Convert:ToUInt64(System.Object):ulong
        call     [rax]System.Convert:ToUInt64(System.Object):ulong
        jmp      SHORT G_M60243_IG21
 						;; size=39 bbWeight=2 PerfScore 33.50
 G_M60243_IG20:
        mov      rdi, gword ptr [rbp-0x58]
        xor      rsi, rsi
        mov      rcx, qword ptr [rbp-0x40]
        mov      rax, qword ptr [rcx+0x58]
        call     [rax]System.Reflection.FieldInfo:GetValue(System.Object):System.Object:this
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Convert:ToInt64(System.Object):long
        call     [rax]System.Convert:ToInt64(System.Object):long
 						;; size=31 bbWeight=2 PerfScore 21.50
 G_M60243_IG21:
        mov      rsi, gword ptr [rbp-0x78]
        mov      rdi, gword ptr [rsi+0x08]
        mov      qword ptr [rdi+0x38], rax
        mov      rdi, r12
        mov      rdx, r13
        mov      rax, 0xD1FFAB1E      ; code for System.Runtime.Serialization.DataContracts.ClassDataContract:CheckAndAddMember(System.Collections.Generic.List`1[System.Runtime.Serialization.DataContracts.DataMember],System.Runtime.Serialization.DataContracts.DataMember,System.Collections.Generic.Dictionary`2[System.String,System.Runtime.Serialization.DataContracts.DataMember])
        call     [rax]System.Runtime.Serialization.DataContracts.ClassDataContract:CheckAndAddMember(System.Collections.Generic.List`1[System.Runtime.Serialization.DataContracts.DataMember],System.Runtime.Serialization.DataContracts.DataMember,System.Collections.Generic.Dictionary`2[System.String,System.Runtime.Serialization.DataContracts.DataMember])
        mov      dword ptr [rbp-0x2C], 1
 						;; size=37 bbWeight=2 PerfScore 17.50
 G_M60243_IG22:
        mov      rcx, 0xD1FFAB1E      ; code for System.Runtime.Serialization.Globals:get_TypeOfDataMemberAttribute():System.Type
        call     [rcx]System.Runtime.Serialization.Globals:get_TypeOfDataMemberAttribute():System.Type
        mov      rsi, rax
        mov      rdi, gword ptr [rbp-0x58]
        xor      edx, edx
        mov      rcx, qword ptr [rbp-0x38]
        call     [rcx+0x28]System.Reflection.MemberInfo:GetCustomAttributes(System.Type,ubyte):System.Object[]:this
        mov      gword ptr [rbp-0x98], rax
        mov      rsi, rax
        mov      rdi, 0xD1FFAB1E      ; System.Linq.Enumerable+Iterator`1[System.Object]
        mov      rcx, 0xD1FFAB1E      ; code for CORINFO_HELP_ISINSTANCEOFCLASS
        call     [rcx]CORINFO_HELP_ISINSTANCEOFCLASS
        test     rax, rax
        jne      G_M60243_IG27
        mov      rax, gword ptr [rbp-0x98]
        test     rax, rax
        jne      SHORT G_M60243_IG23
        mov      rdi, 0xD1FFAB1E      ; System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.Object](System.Collections.Generic.IEnumerable`1[System.Object]):System.Object[]
        xor      rsi, rsi
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.__Canon](System.Collections.Generic.IEnumerable`1[System.__Canon]):System.__Canon[]
        call     [rax]System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.__Canon](System.Collections.Generic.IEnumerable`1[System.__Canon]):System.__Canon[]
-       jmp      G_M60243_IG28
-						;; size=110 bbWeight=2 PerfScore 45.50
+       jmp      SHORT G_M60243_IG28
+						;; size=107 bbWeight=2 PerfScore 45.50
 G_M60243_IG23:
        mov      rdi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.ICollection`1[System.__Canon]:get_Count():int:this
-       call     [r11]System.Collections.Generic.ICollection`1[System.__Canon]:get_Count():int:this
+       call     System.SZArrayHelper:get_Count[System.Object]():int:this
        test     eax, eax
        jne      SHORT G_M60243_IG25
        mov      rdi, 0xD1FFAB1E      ; global ptr
        test     byte  ptr [rdi], 1
        je       G_M60243_IG41
-						;; size=39 bbWeight=2 PerfScore 18.00
+						;; size=31 bbWeight=2 PerfScore 13.50
 G_M60243_IG24:
        mov      rsi, 0xD1FFAB1E      ; data for System.Array+EmptyArray`1[System.Object]:Value
        mov      rax, gword ptr [rsi]
        jmp      SHORT G_M60243_IG26
 						;; size=15 bbWeight=2 PerfScore 8.50
 G_M60243_IG25:
        movsxd   rsi, eax
        mov      rdi, 0xD1FFAB1E      ; System.Object[]
        call     CORINFO_HELP_NEWARR_1_OBJ
        mov      gword ptr [rbp-0xA0], rax
        mov      rdi, gword ptr [rbp-0x98]
        mov      rsi, rax
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.ICollection`1[System.__Canon]:CopyTo(System.__Canon[],int):this
        xor      edx, edx
-       call     [r11]System.Collections.Generic.ICollection`1[System.__Canon]:CopyTo(System.__Canon[],int):this
+       call     System.SZArrayHelper:CopyTo[System.Object](System.Object[],int):this
        mov      rax, gword ptr [rbp-0xA0]
-						;; size=57 bbWeight=2 PerfScore 16.50
+						;; size=49 bbWeight=2 PerfScore 12.00
 G_M60243_IG26:
        jmp      SHORT G_M60243_IG28
 						;; size=2 bbWeight=2 PerfScore 4.00
 G_M60243_IG27:
        mov      rdi, rax
        mov      rax, qword ptr [rax]
        mov      rax, qword ptr [rax+0x40]
        call     [rax+0x20]System.Linq.Enumerable+Iterator`1[System.__Canon]:ToArray():System.__Canon[]:this
 						;; size=13 bbWeight=2 PerfScore 14.50
 G_M60243_IG28:
        test     rax, rax
        je       SHORT G_M60243_IG29
        cmp      dword ptr [rax+0x08], 0
        jne      G_M60243_IG42
 						;; size=15 bbWeight=2 PerfScore 10.50
 G_M60243_IG29:
        cmp      dword ptr [rbp-0x2C], 0
        je       G_M60243_IG37
        jmp      G_M60243_IG08
 						;; size=15 bbWeight=2 PerfScore 10.00
 G_M60243_IG30:
        test     rax, rax
        jne      SHORT G_M60243_IG31
        xor      esi, esi
        jmp      SHORT G_M60243_IG32
 						;; size=9 bbWeight=2 PerfScore 7.00
 G_M60243_IG31:
        mov      rsi, rax
        mov      rdi, 0xD1FFAB1E      ; System.IConvertible
        mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_CHKCASTINTERFACE
        call     [rax]CORINFO_HELP_CHKCASTINTERFACE
        mov      rdi, rax
        mov      r11, 0xD1FFAB1E      ; code for System.IConvertible:ToInt64(System.IFormatProvider):long:this
        xor      rsi, rsi
        call     [r11]System.IConvertible:ToInt64(System.IFormatProvider):long:this
        mov      rsi, rax
 						;; size=46 bbWeight=2 PerfScore 15.50
 G_M60243_IG32:
        mov      rax, gword ptr [rbp-0x50]
        inc      dword ptr [rax+0x14]
        mov      rcx, gword ptr [rax+0x08]
        mov      edx, dword ptr [rax+0x10]
        cmp      dword ptr [rcx+0x08], edx
        ja       SHORT G_M60243_IG33
        mov      rdi, rax
        mov      rcx, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[long]:AddWithResize(long):this
        call     [rcx]System.Collections.Generic.List`1[long]:AddWithResize(long):this
        jmp      SHORT G_M60243_IG37
 						;; size=36 bbWeight=2 PerfScore 35.00
 G_M60243_IG33:
        lea      edi, [rdx+0x01]
        mov      dword ptr [rax+0x10], edi
        mov      edi, edx
        mov      qword ptr [rcx+8*rdi+0x10], rsi
        jmp      SHORT G_M60243_IG37
 						;; size=15 bbWeight=2 PerfScore 9.50
 G_M60243_IG34:
        xor      esi, esi
 						;; size=2 bbWeight=2 PerfScore 0.50
 G_M60243_IG35:
        mov      rax, gword ptr [rbp-0x50]
        inc      dword ptr [rax+0x14]
        mov      rcx, gword ptr [rax+0x08]
        mov      edx, dword ptr [rax+0x10]
        cmp      dword ptr [rcx+0x08], edx
        ja       SHORT G_M60243_IG36
        mov      rdi, rax
        mov      rcx, 0xD1FFAB1E      ; code for System.Collections.Generic.List`1[long]:AddWithResize(long):this
        call     [rcx]System.Collections.Generic.List`1[long]:AddWithResize(long):this
        jmp      SHORT G_M60243_IG37
 						;; size=36 bbWeight=2 PerfScore 35.00
 G_M60243_IG36:
        lea      edi, [rdx+0x01]
        mov      dword ptr [rax+0x10], edi
        mov      edi, edx
        mov      qword ptr [rcx+8*rdi+0x10], rsi
 						;; size=13 bbWeight=2 PerfScore 5.50
 G_M60243_IG37:
        mov      rdi, qword ptr [rbp-0x48]
        inc      edi
        cmp      dword ptr [r14+0x08], edi
        mov      rcx, rdi
        jg       G_M60243_IG03
 						;; size=19 bbWeight=4 PerfScore 22.00
 G_M60243_IG38:
        lock     
        or       dword ptr [rsp], 0
        lea      rdi, bword ptr [rbx+0x58]
        mov      rsi, r12
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x60]
        mov      rsi, gword ptr [rbp-0x50]
        call     CORINFO_HELP_ASSIGN_REF
        nop      
 						;; size=31 bbWeight=1 PerfScore 20.50
 G_M60243_IG39:
        add      rsp, 136
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=18 bbWeight=1 PerfScore 4.25
 G_M60243_IG40:
        mov      rdi, 0xD1FFAB1E      ; System.Array+EmptyArray`1[System.Object]
        call     CORINFO_HELP_GET_GCSTATIC_BASE
        jmp      G_M60243_IG11
 						;; size=20 bbWeight=0 PerfScore 0.00
 G_M60243_IG41:
        mov      rdi, 0xD1FFAB1E      ; System.Array+EmptyArray`1[System.Object]
        call     CORINFO_HELP_GET_GCSTATIC_BASE
        jmp      G_M60243_IG24
 						;; size=20 bbWeight=0 PerfScore 0.00
 G_M60243_IG42:
        mov      edi, 0x60B
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.SR:GetResourceString(System.String):System.String
        call     [rax]System.SR:GetResourceString(System.String):System.String
        mov      r15, rax
        mov      rdi, gword ptr [rbp-0x58]
        mov      r14, qword ptr [rbp-0x40]
        mov      rax, qword ptr [r14+0x40]
        call     [rax+0x38]System.Reflection.MemberInfo:get_DeclaringType():System.Type:this
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Runtime.Serialization.DataContracts.DataContract:GetClrTypeFullName(System.Type):System.String
        call     [rax]System.Runtime.Serialization.DataContracts.DataContract:GetClrTypeFullName(System.Type):System.String
        mov      r13, rax
        mov      rdi, gword ptr [rbp-0x58]
        mov      rax, qword ptr [r14+0x40]
        call     [rax+0x30]System.Reflection.MemberInfo:get_Name():System.String:this
        mov      rdx, rax
        mov      rdi, r15
        mov      rsi, r13
        mov      rax, 0xD1FFAB1E      ; code for System.SR:Format(System.String,System.Object,System.Object):System.String
        call     [rax]System.SR:Format(System.String,System.Object,System.Object):System.String
        mov      rdi, rax
        mov      rsi, gword ptr [rbx+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Runtime.Serialization.DataContracts.DataContract+DataContractCriticalHelper:ThrowInvalidDataContractException(System.String,System.Type)
        call     [rax]System.Runtime.Serialization.DataContracts.DataContract+DataContractCriticalHelper:ThrowInvalidDataContractException(System.String,System.Type)
        int3     
 						;; size=123 bbWeight=0 PerfScore 0.00
 G_M60243_IG43:
        mov      edi, 0xE41
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.SR:GetResourceString(System.String):System.String
        call     [rax]System.SR:GetResourceString(System.String):System.String
        mov      r13, rax
        mov      rdi, gword ptr [rbp-0x58]
        mov      r14, qword ptr [rbp-0x40]
        mov      rax, qword ptr [r14+0x40]
        call     [rax+0x30]System.Reflection.MemberInfo:get_Name():System.String:this
        mov      r14, rax
        mov      rdi, r15
        mov      rax, 0xD1FFAB1E      ; code for System.Runtime.Serialization.DataContracts.DataContract:GetClrTypeFullName(System.Type):System.String
        call     [rax]System.Runtime.Serialization.DataContracts.DataContract:GetClrTypeFullName(System.Type):System.String
        mov      rdx, rax
        mov      rdi, r13
        mov      rsi, r14
        mov      rax, 0xD1FFAB1E      ; code for System.SR:Format(System.String,System.Object,System.Object):System.String
        call     [rax]System.SR:Format(System.String,System.Object,System.Object):System.String
        mov      rdi, rax
        mov      rsi, gword ptr [rbx+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Runtime.Serialization.DataContracts.DataContract+DataContractCriticalHelper:ThrowInvalidDataContractException(System.String,System.Type)
        call     [rax]System.Runtime.Serialization.DataContracts.DataContract+DataContractCriticalHelper:ThrowInvalidDataContractException(System.String,System.Type)
        int3     
 						;; size=112 bbWeight=0 PerfScore 0.00
 G_M60243_IG44:
        mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_CHKCASTCLASS
        call     [rax]CORINFO_HELP_CHKCASTCLASS
        int3     
 						;; size=13 bbWeight=0 PerfScore 0.00
 G_M60243_IG45:
        mov      edi, 0x1F65
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.SR:GetResourceString(System.String):System.String
        call     [rax]System.SR:GetResourceString(System.String):System.String
        mov      r15, rax
        mov      rdi, gword ptr [rbp-0x58]
        mov      r14, qword ptr [rbp-0x40]
        mov      rax, qword ptr [r14+0x40]
        call     [rax+0x38]System.Reflection.MemberInfo:get_DeclaringType():System.Type:this
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Runtime.Serialization.DataContracts.DataContract:GetClrTypeFullName(System.Type):System.String
        call     [rax]System.Runtime.Serialization.DataContracts.DataContract:GetClrTypeFullName(System.Type):System.String
        mov      r13, rax
        mov      rdi, gword ptr [rbp-0x58]
        mov      rax, qword ptr [r14+0x40]
        call     [rax+0x30]System.Reflection.MemberInfo:get_Name():System.String:this
        mov      rdx, rax
        mov      rdi, r15
        mov      rsi, r13
        mov      rax, 0xD1FFAB1E      ; code for System.SR:Format(System.String,System.Object,System.Object):System.String
        call     [rax]System.SR:Format(System.String,System.Object,System.Object):System.String
        mov      rdi, rax
        mov      rsi, gword ptr [rbx+0x08]
        mov      rax, 0xD1FFAB1E      ; code for System.Runtime.Serialization.DataContracts.DataContract+DataContractCriticalHelper:ThrowInvalidDataContractException(System.String,System.Type)
        call     [rax]System.Runtime.Serialization.DataContracts.DataContract+DataContractCriticalHelper:ThrowInvalidDataContractException(System.String,System.Type)
        int3     
 						;; size=123 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 2080, prolog size 25, PerfScore 863.75, instruction count 477, allocated bytes for code 2080 (MethodHash=4b7514ac) for method System.Runtime.Serialization.DataContracts.EnumDataContract+EnumDataContractCriticalHelper:ImportDataMembers():this (FullOpts)
+; Total bytes of code 2045, prolog size 25, PerfScore 845.75, instruction count 473, allocated bytes for code 2045 (MethodHash=4b7514ac) for method System.Runtime.Serialization.DataContracts.EnumDataContract+EnumDataContractCriticalHelper:ImportDataMembers():this (FullOpts)
 ; ============================================================

-16 (-8.04 % of base) - Microsoft.Extensions.DependencyModel.CompilationOptions:.cctor()

 ; Assembly listing for method Microsoft.Extensions.DependencyModel.CompilationOptions:.cctor() (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 5 single block inlinees; 3 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;* V00 loc0         [V00    ] (  0,  0   )  struct ( 8) zero-ref    ld-addr-op <System.Nullable`1[ubyte]>
 ;# V01 OutArgs      [V01    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;  V02 tmp1         [V02,T01] (  3,  3   )     ref  ->  rbx         class-hnd exact single-def "impAppendStmt" <System.String[]>
 ;* V03 tmp2         [V03    ] (  0,  0   )  struct ( 8) zero-ref    "impAppendStmt" <System.Nullable`1[ubyte]>
 ;* V04 tmp3         [V04    ] (  0,  0   )  struct ( 8) zero-ref    "impAppendStmt" <System.Nullable`1[ubyte]>
 ;* V05 tmp4         [V05    ] (  0,  0   )  struct ( 8) zero-ref    "impAppendStmt" <System.Nullable`1[ubyte]>
 ;* V06 tmp5         [V06    ] (  0,  0   )  struct ( 8) zero-ref    "impAppendStmt" <System.Nullable`1[ubyte]>
 ;* V07 tmp6         [V07    ] (  0,  0   )  struct ( 8) zero-ref    "impAppendStmt" <System.Nullable`1[ubyte]>
 ;* V08 tmp7         [V08    ] (  0,  0   )  struct ( 8) zero-ref    "impAppendStmt" <System.Nullable`1[ubyte]>
 ;  V09 tmp8         [V09,T00] ( 11, 21   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <Microsoft.Extensions.DependencyModel.CompilationOptions>
 ;* V10 tmp9         [V10    ] (  0,  0   )  struct ( 8) zero-ref    "Inlining Arg" <System.Nullable`1[ubyte]>
 ;  V11 tmp10        [V11,T03] (  2,  2   )     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.String[]>
 ;* V12 tmp11        [V12    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <System.Linq.Enumerable+Iterator`1[System.String]>
 ;* V13 tmp12        [V13    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.String[]>
 ;  V14 tmp13        [V14,T02] (  3,  2   )     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.String[]>
 ;  V15 tmp14        [V15,T05] (  3,  1.50)     int  ->  rax         single-def "Inline stloc first use temp"
 ;  V16 tmp15        [V16,T04] (  3,  1.50)     ref  ->  r14         class-hnd exact single-def "Inline stloc first use temp" <System.String[]>
 ;* V17 tmp16        [V17    ] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V00.hasValue (fldOffset=0x0)" P-INDEP
 ;* V18 tmp17        [V18    ] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V00.value (fldOffset=0x1)" P-INDEP
 ;* V19 tmp18        [V19,T06] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V03.hasValue (fldOffset=0x0)" P-INDEP
 ;* V20 tmp19        [V20,T07] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V03.value (fldOffset=0x1)" P-INDEP
 ;* V21 tmp20        [V21,T08] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V04.hasValue (fldOffset=0x0)" P-INDEP
 ;* V22 tmp21        [V22,T09] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V04.value (fldOffset=0x1)" P-INDEP
 ;* V23 tmp22        [V23,T10] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V05.hasValue (fldOffset=0x0)" P-INDEP
 ;* V24 tmp23        [V24,T11] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V05.value (fldOffset=0x1)" P-INDEP
 ;* V25 tmp24        [V25,T12] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V06.hasValue (fldOffset=0x0)" P-INDEP
 ;* V26 tmp25        [V26,T13] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V06.value (fldOffset=0x1)" P-INDEP
 ;* V27 tmp26        [V27,T14] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V07.hasValue (fldOffset=0x0)" P-INDEP
 ;* V28 tmp27        [V28,T15] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V07.value (fldOffset=0x1)" P-INDEP
 ;* V29 tmp28        [V29,T16] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V08.hasValue (fldOffset=0x0)" P-INDEP
 ;* V30 tmp29        [V30,T17] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V08.value (fldOffset=0x1)" P-INDEP
 ;* V31 tmp30        [V31,T18] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V10.hasValue (fldOffset=0x0)" P-INDEP
 ;* V32 tmp31        [V32,T19] (  0,  0   )   ubyte  ->  zero-ref    single-def "field V10.value (fldOffset=0x1)" P-INDEP
 ;
 ; Lcl frame size = 8
 
 G_M20015_IG01:
        push     rbp
        push     r15
        push     r14
        push     rbx
        push     rax
        lea      rbp, [rsp+0x20]
 						;; size=12 bbWeight=0.50 PerfScore 2.75
 G_M20015_IG02:
        mov      rdi, 0xD1FFAB1E      ; const ptr
        mov      rbx, gword ptr [rdi]
        mov      rdi, 0xD1FFAB1E      ; Microsoft.Extensions.DependencyModel.CompilationOptions
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        mov      rdi, rbx
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.ICollection`1[System.__Canon]:get_Count():int:this
-       call     [r11]System.Collections.Generic.ICollection`1[System.__Canon]:get_Count():int:this
+       call     System.SZArrayHelper:get_Count[System.Object]():int:this
        test     eax, eax
        jne      SHORT G_M20015_IG03
        mov      rax, 0xD1FFAB1E      ; const ptr
        mov      rsi, gword ptr [rax]
        jmp      SHORT G_M20015_IG04
-						;; size=66 bbWeight=0.50 PerfScore 6.38
+						;; size=58 bbWeight=0.50 PerfScore 5.25
 G_M20015_IG03:
        movsxd   rsi, eax
        mov      rdi, 0xD1FFAB1E      ; System.String[]
        call     CORINFO_HELP_NEWARR_1_OBJ
        mov      r14, rax
        mov      rdi, rbx
        mov      rsi, r14
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.ICollection`1[System.__Canon]:CopyTo(System.__Canon[],int):this
        xor      edx, edx
-       call     [r11]System.Collections.Generic.ICollection`1[System.__Canon]:CopyTo(System.__Canon[],int):this
+       call     System.SZArrayHelper:CopyTo[System.Object](System.Object[],int):this
        mov      rsi, r14
-						;; size=45 bbWeight=0.50 PerfScore 3.00
+						;; size=37 bbWeight=0.50 PerfScore 1.88
 G_M20015_IG04:
        lea      rdi, bword ptr [r15+0x08]
        call     CORINFO_HELP_ASSIGN_REF
        xor      rdi, rdi
        mov      gword ptr [r15+0x10], rdi
 						;; size=15 bbWeight=1 PerfScore 2.75
 G_M20015_IG05:
        mov      gword ptr [r15+0x18], rdi
 						;; size=4 bbWeight=1 PerfScore 1.00
 G_M20015_IG06:
        mov      dword ptr [r15+0x30], edi
        mov      word  ptr [r15+0x34], 0
 						;; size=11 bbWeight=1 PerfScore 2.00
 G_M20015_IG07:
        mov      gword ptr [r15+0x20], rdi
 						;; size=4 bbWeight=1 PerfScore 1.00
 G_M20015_IG08:
        mov      dword ptr [r15+0x36], edi
 						;; size=4 bbWeight=1 PerfScore 1.00
 G_M20015_IG09:
        mov      gword ptr [r15+0x28], rdi
 						;; size=4 bbWeight=1 PerfScore 1.00
 G_M20015_IG10:
        mov      dword ptr [r15+0x3A], edi
        mov      rdi, 0xD1FFAB1E      ; data for Microsoft.Extensions.DependencyModel.CompilationOptions:<Default>k__BackingField
        mov      rsi, r15
        call     CORINFO_HELP_ASSIGN_REF
        nop      
 						;; size=23 bbWeight=1 PerfScore 2.75
 G_M20015_IG11:
        add      rsp, 8
        pop      rbx
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=11 bbWeight=1 PerfScore 3.25
 
-; Total bytes of code 199, prolog size 12, PerfScore 26.88, instruction count 50, allocated bytes for code 199 (MethodHash=d9fbb1d0) for method Microsoft.Extensions.DependencyModel.CompilationOptions:.cctor() (FullOpts)
+; Total bytes of code 183, prolog size 12, PerfScore 24.62, instruction count 48, allocated bytes for code 183 (MethodHash=d9fbb1d0) for method Microsoft.Extensions.DependencyModel.CompilationOptions:.cctor() (FullOpts)
 ; ============================================================

-16 (-9.88 % of base) - Microsoft.Extensions.DependencyModel.RuntimeAssetGroup:.ctor(System.String,System.String[]):this

 ; Assembly listing for method Microsoft.Extensions.DependencyModel.RuntimeAssetGroup:.ctor(System.String,System.String[]):this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 3 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T01] (  4,  4   )     ref  ->  r15         this class-hnd single-def <Microsoft.Extensions.DependencyModel.RuntimeAssetGroup>
 ;  V01 arg1         [V01,T02] (  3,  3   )     ref  ->  rsi         class-hnd single-def <System.String>
 ;  V02 arg2         [V02,T00] (  5,  4   )     ref  ->  rbx         class-hnd single-def <System.String[]>
 ;# V03 OutArgs      [V03    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;  V04 tmp1         [V04,T03] (  3,  2   )     ref  ->  rax         class-hnd "Inline return value spill temp" <System.String[]>
 ;* V05 tmp2         [V05    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <System.Linq.Enumerable+Iterator`1[System.String]>
 ;* V06 tmp3         [V06    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.String[]>
 ;  V07 tmp4         [V07,T04] (  3,  1.50)     ref  ->  rax         class-hnd "Inline return value spill temp" <System.String[]>
 ;  V08 tmp5         [V08,T06] (  3,  1.50)     int  ->  rax         "Inline stloc first use temp"
 ;  V09 tmp6         [V09,T05] (  3,  1.50)     ref  ->  r14         class-hnd exact single-def "Inline stloc first use temp" <System.String[]>
 ;
 ; Lcl frame size = 8
 
 G_M53872_IG01:
        push     rbp
        push     r15
        push     r14
        push     rbx
        push     rax
        lea      rbp, [rsp+0x20]
        mov      r15, rdi
        mov      rbx, rdx
 						;; size=18 bbWeight=1 PerfScore 6.00
 G_M53872_IG02:
        lea      rdi, bword ptr [r15+0x18]
        call     CORINFO_HELP_ASSIGN_REF
        test     rbx, rbx
        jne      SHORT G_M53872_IG04
 						;; size=14 bbWeight=1 PerfScore 2.75
 G_M53872_IG03:
        mov      rdi, 0xD1FFAB1E      ; System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.String](System.Collections.Generic.IEnumerable`1[System.String]):System.String[]
        xor      rsi, rsi
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.__Canon](System.Collections.Generic.IEnumerable`1[System.__Canon]):System.__Canon[]
        call     [rax]System.Linq.Enumerable:<ToArray>g__EnumerableToArray|314_0[System.__Canon](System.Collections.Generic.IEnumerable`1[System.__Canon]):System.__Canon[]
        jmp      SHORT G_M53872_IG06
 						;; size=26 bbWeight=0.50 PerfScore 2.88
 G_M53872_IG04:
        mov      rdi, rbx
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.ICollection`1[System.__Canon]:get_Count():int:this
-       call     [r11]System.Collections.Generic.ICollection`1[System.__Canon]:get_Count():int:this
+       call     System.SZArrayHelper:get_Count[System.Object]():int:this
        test     eax, eax
        jne      SHORT G_M53872_IG05
        mov      rax, 0xD1FFAB1E      ; const ptr
        mov      rax, gword ptr [rax]
        jmp      SHORT G_M53872_IG06
-						;; size=35 bbWeight=0.50 PerfScore 4.50
+						;; size=27 bbWeight=0.50 PerfScore 3.38
 G_M53872_IG05:
        movsxd   rsi, eax
        mov      rdi, 0xD1FFAB1E      ; System.String[]
        call     CORINFO_HELP_NEWARR_1_OBJ
        mov      r14, rax
        mov      rdi, rbx
        mov      rsi, r14
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.ICollection`1[System.__Canon]:CopyTo(System.__Canon[],int):this
        xor      edx, edx
-       call     [r11]System.Collections.Generic.ICollection`1[System.__Canon]:CopyTo(System.__Canon[],int):this
+       call     System.SZArrayHelper:CopyTo[System.Object](System.Object[],int):this
        mov      rax, r14
-						;; size=45 bbWeight=0.50 PerfScore 3.00
+						;; size=37 bbWeight=0.50 PerfScore 1.88
 G_M53872_IG06:
        lea      rdi, bword ptr [r15+0x08]
        mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        nop      
 						;; size=13 bbWeight=1 PerfScore 2.00
 G_M53872_IG07:
        add      rsp, 8
        pop      rbx
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=11 bbWeight=1 PerfScore 3.25
 
-; Total bytes of code 162, prolog size 12, PerfScore 24.38, instruction count 45, allocated bytes for code 162 (MethodHash=4a652d8f) for method Microsoft.Extensions.DependencyModel.RuntimeAssetGroup:.ctor(System.String,System.String[]):this (FullOpts)
+; Total bytes of code 146, prolog size 12, PerfScore 22.12, instruction count 43, allocated bytes for code 146 (MethodHash=4a652d8f) for method Microsoft.Extensions.DependencyModel.RuntimeAssetGroup:.ctor(System.String,System.String[]):this (FullOpts)
 ; ============================================================

-10 (-7.94 % of base) - System.Net.Http.Headers.HttpHeaders:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this

 ; Assembly listing for method System.Net.Http.Headers.HttpHeaders:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
-; fully interruptible
+; partially interruptible
 ; No PGO data
 ; 0 inlinees with PGO data; 4 single block inlinees; 1 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 this         [V00,T00] (  4,  3.50)     ref  ->  rbx         this class-hnd single-def <System.Net.Http.Headers.HttpHeaders>
 ;# V01 OutArgs      [V01    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
-;* V02 tmp1         [V02    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Collections.Generic.IEnumerable`1[System.String]]]>
+;  V02 tmp1         [V02,T02] (  3,  2   )     ref  ->  rax         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Collections.Generic.IEnumerable`1[System.String]]]>
 ;  V03 tmp2         [V03,T01] (  4,  4   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.Net.Http.Headers.HttpHeaders+<GetEnumeratorCore>d__24>
-;  V04 tmp3         [V04,T02] (  2,  2   )     ref  ->  rdi         single-def "argument with side effect"
 ;
 ; Lcl frame size = 0
 
 G_M54155_IG01:
        push     rbp
        push     r15
        push     rbx
        lea      rbp, [rsp+0x10]
        mov      rbx, rdi
 						;; size=12 bbWeight=1 PerfScore 3.75
 G_M54155_IG02:
        cmp      dword ptr [rbx+0x10], 0
-       jne      SHORT G_M54155_IG06
+       jne      SHORT G_M54155_IG05
 						;; size=6 bbWeight=1 PerfScore 4.00
 G_M54155_IG03:
        mov      rdi, 0xD1FFAB1E      ; global ptr
        test     byte  ptr [rdi], 1
-       je       SHORT G_M54155_IG08
+       je       SHORT G_M54155_IG07
 						;; size=15 bbWeight=0.50 PerfScore 2.12
 G_M54155_IG04:
        mov      rdi, 0xD1FFAB1E      ; data for System.Array+EmptyArray`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Collections.Generic.IEnumerable`1[System.String]]]:Value
        mov      rdi, gword ptr [rdi]
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerable`1[System.Collections.Generic.KeyValuePair`2[System.__Canon,System.__Canon]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.__Canon,System.__Canon]]:this
        cmp      dword ptr [rdi], edi
-						;; size=25 bbWeight=0.50 PerfScore 2.75
+       call     System.SZArrayHelper:GetEnumerator[System.Collections.Generic.KeyValuePair`2[System.String,System.Collections.Generic.IEnumerable`1[System.String]]]():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Collections.Generic.IEnumerable`1[System.String]]]:this
+       jmp      SHORT G_M54155_IG06
+						;; size=22 bbWeight=0.50 PerfScore 4.12
 G_M54155_IG05:
-       pop      rbx
-       pop      r15
-       pop      rbp
-       tail.jmp [r11]System.Collections.Generic.IEnumerable`1[System.Collections.Generic.KeyValuePair`2[System.__Canon,System.__Canon]]:GetEnumerator():System.Collections.Generic.IEnumerator`1[System.Collections.Generic.KeyValuePair`2[System.__Canon,System.__Canon]]:this
-						;; size=7 bbWeight=0.50 PerfScore 1.75
-G_M54155_IG06:
        mov      rdi, 0xD1FFAB1E      ; System.Net.Http.Headers.HttpHeaders+<GetEnumeratorCore>d__24
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        xor      edi, edi
        mov      dword ptr [r15+0x18], edi
        lea      rdi, bword ptr [r15+0x08]
        mov      rsi, rbx
        call     CORINFO_HELP_ASSIGN_REF
        mov      rax, r15
 						;; size=39 bbWeight=0.50 PerfScore 2.38
-G_M54155_IG07:
+G_M54155_IG06:
        pop      rbx
        pop      r15
        pop      rbp
        ret      
-						;; size=5 bbWeight=0.50 PerfScore 1.25
-G_M54155_IG08:
+						;; size=5 bbWeight=1 PerfScore 2.50
+G_M54155_IG07:
        mov      rdi, 0xD1FFAB1E      ; System.Array+EmptyArray`1[System.Collections.Generic.KeyValuePair`2[System.String,System.Collections.Generic.IEnumerable`1[System.String]]]
        call     CORINFO_HELP_GET_GCSTATIC_BASE
        jmp      SHORT G_M54155_IG04
 						;; size=17 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 126, prolog size 12, PerfScore 18.00, instruction count 34, allocated bytes for code 126 (MethodHash=e0352c74) for method System.Net.Http.Headers.HttpHeaders:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
+; Total bytes of code 116, prolog size 9, PerfScore 18.88, instruction count 31, allocated bytes for code 116 (MethodHash=e0352c74) for method System.Net.Http.Headers.HttpHeaders:System.Collections.IEnumerable.GetEnumerator():System.Collections.IEnumerator:this (FullOpts)
 ; ============================================================

Note: some changes were skipped as they were too large to fit into a comment.

Larger list of diffs: https://gist.github.com/MihuBot/b2a4f8f16dab41f39859af3e68a996f2

[MihuBot]

@AndyAyersMS