[Perf] Linux/x64: 5 Improvements on 7/9/2025 3:09:24 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [d4c1aa960faf004b0de3676f591ad3405b7d1db1](https://github.com/dotnet/runtime/commit/d4c1aa960faf004b0de3676f591ad3405b7d1db1)
Compare | [baf534c8a3307ac0505ac67f37a6cc92fba16b70](https://github.com/dotnet/runtime/commit/baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d4c1aa960faf004b0de3676f591ad3405b7d1db1...baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Memory.ReadOnlySpan

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[IndexOfString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Memory.ReadOnlySpan.IndexOfString(input%3a%20%22AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAXAAAAAAAAAAAAAAAAAAAAAAAAAAAAA%22%2c%20value%3a%20%22x%22%2c%20comparisonType%3a%20InvariantCultureIgno.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/ReadOnlySpan.cs#L45-#L65>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 122.64 ns | 113.06 ns | 0.92 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Memory.ReadOnlySpan_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Memory.ReadOnlySpan.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.ReadOnlySpan*'
```

<details>

### System.Memory.ReadOnlySpan.IndexOfString(input: "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAXAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", value: "x", comparisonType: InvariantCultureIgnoreCase)

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [d4c1aa960faf004b0de3676f591ad3405b7d1db1](https://github.com/dotnet/runtime/commit/d4c1aa960faf004b0de3676f591ad3405b7d1db1)
Compare | [baf534c8a3307ac0505ac67f37a6cc92fba16b70](https://github.com/dotnet/runtime/commit/baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d4c1aa960faf004b0de3676f591ad3405b7d1db1...baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Numerics.Tests.Constructor

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[SpanCastBenchmark_UInt32 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Numerics.Tests.Constructor.SpanCastBenchmark_UInt32.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Numerics.Vectors/GenericVectorConstructorTests.cs#L41-#L43>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.61 ns | 0.22 ns | 0.14 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Numerics.Tests.Constructor_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Numerics.Tests.Constructor.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Numerics.Tests.Constructor*'
```

<details>

### System.Numerics.Tests.Constructor.SpanCastBenchmark_UInt32

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [d4c1aa960faf004b0de3676f591ad3405b7d1db1](https://github.com/dotnet/runtime/commit/d4c1aa960faf004b0de3676f591ad3405b7d1db1)
Compare | [baf534c8a3307ac0505ac67f37a6cc92fba16b70](https://github.com/dotnet/runtime/commit/baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d4c1aa960faf004b0de3676f591ad3405b7d1db1...baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Buffers.Text.Tests.Utf8ParserTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[TryParseUInt64Hex - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Text.Tests.Utf8ParserTests.TryParseUInt64Hex(value%3a%20FFFFFFFFFFFFFFFF).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/Utf8ParserTests.cs#L36-#L38>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 7.92 ns | 6.19 ns | 0.78 | 0.04 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Buffers.Text.Tests.Utf8ParserTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Buffers.Text.Tests.Utf8ParserTests.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Buffers.Text.Tests.Utf8ParserTests*'
```

<details>

### System.Buffers.Text.Tests.Utf8ParserTests.TryParseUInt64Hex(value: FFFFFFFFFFFFFFFF)

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [d4c1aa960faf004b0de3676f591ad3405b7d1db1](https://github.com/dotnet/runtime/commit/d4c1aa960faf004b0de3676f591ad3405b7d1db1)
Compare | [baf534c8a3307ac0505ac67f37a6cc92fba16b70](https://github.com/dotnet/runtime/commit/baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d4c1aa960faf004b0de3676f591ad3405b7d1db1...baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Tests.Perf_String

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[IndexerCheckLengthHoisting - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Tests.Perf_String.IndexerCheckLengthHoisting.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime/Perf.String.cs#L267-#L279>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 38.84 ns | 20.11 ns | 0.52 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Tests.Perf_String_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Tests.Perf_String.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_String*'
```

<details>

### System.Tests.Perf_String.IndexerCheckLengthHoisting

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [d4c1aa960faf004b0de3676f591ad3405b7d1db1](https://github.com/dotnet/runtime/commit/d4c1aa960faf004b0de3676f591ad3405b7d1db1)
Compare | [baf534c8a3307ac0505ac67f37a6cc92fba16b70](https://github.com/dotnet/runtime/commit/baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d4c1aa960faf004b0de3676f591ad3405b7d1db1...baf534c8a3307ac0505ac67f37a6cc92fba16b70)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Text.Tests.Perf_StringBuilder

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Insert_Strings - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Text.Tests.Perf_StringBuilder.Insert_Strings.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text/Perf.StringBuilder.cs#L263-#L281>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 399.35 ns | 280.39 ns | 0.70 | 0.08 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Text.Tests.Perf_StringBuilder_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Improvement/System.Text.Tests.Perf_StringBuilder.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Tests.Perf_StringBuilder*'
```

<details>

### System.Text.Tests.Perf_StringBuilder.Insert_Strings

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>

Name	Value
Architecture	x64
OS	ubuntu 22.04
Queue	ViperUbuntu
Baseline	d4c1aa960faf004b0de3676f591ad3405b7d1db1
Compare	baf534c8a3307ac0505ac67f37a6cc92fba16b70
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

[Perf] Linux/x64: 5 Improvements on 7/9/2025 3:09:24 AM +00:00 #59292

Description

Run Information

Improvements in System.Memory.ReadOnlySpan

Repro

System.Memory.ReadOnlySpan.IndexOfString(input: "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAXAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", value: "x", comparisonType: InvariantCultureIgnoreCase)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Numerics.Tests.Constructor

Repro

System.Numerics.Tests.Constructor.SpanCastBenchmark_UInt32

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Buffers.Text.Tests.Utf8ParserTests

Repro

System.Buffers.Text.Tests.Utf8ParserTests.TryParseUInt64Hex(value: FFFFFFFFFFFFFFFF)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Tests.Perf_String

Repro

System.Tests.Perf_String.IndexerCheckLengthHoisting

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Text.Tests.Perf_StringBuilder

Repro

System.Text.Tests.Perf_StringBuilder.Insert_Strings

ETL Files

Histogram

JIT Disasms

Docs

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