[Perf] Linux/arm64: 7 Regressions on 2/23/2024 10:12:07 PM

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [d98af689a245bbc983ea71c52e15ff9cdf376ec7](https://github.com/dotnet/runtime/commit/d98af689a245bbc983ea71c52e15ff9cdf376ec7)
Compare | [7b54246a7bd6b4ea09895b22ba30e45059fbedb4](https://github.com/dotnet/runtime/commit/7b54246a7bd6b4ea09895b22ba30e45059fbedb4)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d98af689a245bbc983ea71c52e15ff9cdf376ec7...7b54246a7bd6b4ea09895b22ba30e45059fbedb4)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Memory.Span&lt;Char&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[SequenceEqual - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).SequenceEqual(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L52-#L53>)</li><li>[📈 - ADX Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACo1UXW/TQBB8R+I/3JttcBPHoZREuCINKbQQFJK8IYQu9jY+dB/u3l0bVxW/nTsnCk0qIb9YvvHM7Nxq11Og2iIIkEa/eCT3JSCQC8t4MYdKkSwjQaGMBNNFKw0TEByyLpDKvGx4CDe6WwItdFdQJo+II8xLZiA3rhphkoTB5u2bICYBReFeoj17Cdp8owK854dgUWsDojMFobDuLCoq349LiuedBdxakDlMbi3l4YI9wJCc9tLoX9m5lWMlb9jaIjVMSf0jGCtRMd6cpqqA4CfJ/pDAMEcvgpf/UzroC5PFTiFYjuqJgGkQlanDZ8KRMlEL2pXSX/mdaBrVhn+tJ3LNJLTheuM2vKmSqmVcT72SBrBCcM82ktlaLeuqVeBZWWuWUz5DJZRH2go/1ytkxSeuVpSzhwZrI5un87YVJpsK0C2BbCb0cGbHyi0I4FJVu7fD+V862cJQUZFzUlADfpfCNEn7J73eSTpYJmfD02TYSzr99N0gORu8TpJhkvgS2gpB0Q04obj+JegmbAx9gpi8isiqPqoQ73co9qP83YIF51Oh+u327xl5Dtpyk6FLXYRPbrLFR3eAdO2c+lFMGitvnF0iA1nweo/4ZjUHHxndN0Di75i7bTXknpmShNo1D3S218RkkytuhcyOM9VbXGfbEI5omOGQBR9d69xfo94dvYSEUkce0xVnJqMb0NFf0MjDO9cEAAA=>)</li></ul> | 58.63 ns | 66.41 ns | 1.13 | 0.01 | True | | |
|<ul><li>[EndsWith - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).EndsWith(Size%3a%204).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L64-#L65>)</li><li>[📈 - ADX Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 3.42 ns | 5.25 ns | 1.53 | 0.57 | True | | |
|<ul><li>[EndsWith - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).EndsWith(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L64-#L65>)</li><li>[📈 - ADX Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 31.62 ns | 34.48 ns | 1.09 | 0.16 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Char%29_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Char%29_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Char%29_3.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Char%29.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.Span&lt;Char&gt;*'
```

<details>


### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2115f044-21db-4480-a784-43dc35f3fb54f504aa7f68c4af3b6/a8a9ede1-d462-4eec-8fdb-48de6832be89.zip?sv=2021-08-06&se=2024-03-24T07%3A37%3A42Z&sr=c&sp=rl&sig=bmNvnVKmZVZWpUgC88Jay5cQTEnzF%2BFgfcmBa7BHLto%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-a74ec1d7-d175-4f65-9922-430c7a9a0f3dc7f0e6147ce44c3ad/ebdc95c9-c0d0-403c-a998-2ca32eeba0cb.zip?sv=2021-08-06&se=2024-03-25T08%3A19%3A11Z&sr=c&sp=rl&sig=C0a%2Fb2YqgSKzmJxEHdM6cj7jklPWJSo3uT8SmPzu%2FJ0%3D>)
### System.Memory.Span&lt;Char&gt;.SequenceEqual(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Char&gt;.EndsWith(Size: 4)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Char&gt;.EndsWith(Size: 512)

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [d98af689a245bbc983ea71c52e15ff9cdf376ec7](https://github.com/dotnet/runtime/commit/d98af689a245bbc983ea71c52e15ff9cdf376ec7)
Compare | [7b54246a7bd6b4ea09895b22ba30e45059fbedb4](https://github.com/dotnet/runtime/commit/7b54246a7bd6b4ea09895b22ba30e45059fbedb4)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d98af689a245bbc983ea71c52e15ff9cdf376ec7...7b54246a7bd6b4ea09895b22ba30e45059fbedb4)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Memory.Span&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[EndsWith - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Int32).EndsWith(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L64-#L65>)</li><li>[📈 - ADX Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 57.88 ns | 64.75 ns | 1.12 | 0.03 | True | | |
|<ul><li>[StartsWith - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Int32).StartsWith(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L61-#L62>)</li><li>[📈 - ADX Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 56.57 ns | 64.96 ns | 1.15 | 0.01 | True | | |
|<ul><li>[SequenceEqual - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Int32).SequenceEqual(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L52-#L53>)</li><li>[📈 - ADX Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 108.09 ns | 127.47 ns | 1.18 | 0.01 | True | | |
|<ul><li>[EndsWith - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Int32).EndsWith(Size%3a%204).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L64-#L65>)</li><li>[📈 - ADX Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 3.62 ns | 5.11 ns | 1.41 | 0.55 | True | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Int32%29_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Int32%29_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Int32%29_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Int32%29_4.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/02_29_2024/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Memory.Span%28Int32%29.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.Span&lt;Int32&gt;*'
```

<details>


### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2115f044-21db-4480-a784-43dc35f3fb54f504aa7f68c4af3b6/a8a9ede1-d462-4eec-8fdb-48de6832be89.zip?sv=2021-08-06&se=2024-03-24T07%3A37%3A42Z&sr=c&sp=rl&sig=bmNvnVKmZVZWpUgC88Jay5cQTEnzF%2BFgfcmBa7BHLto%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-a74ec1d7-d175-4f65-9922-430c7a9a0f3dc7f0e6147ce44c3ad/ebdc95c9-c0d0-403c-a998-2ca32eeba0cb.zip?sv=2021-08-06&se=2024-03-25T08%3A19%3A11Z&sr=c&sp=rl&sig=C0a%2Fb2YqgSKzmJxEHdM6cj7jklPWJSo3uT8SmPzu%2FJ0%3D>)
### System.Memory.Span&lt;Int32&gt;.EndsWith(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Int32&gt;.StartsWith(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Int32&gt;.SequenceEqual(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Int32&gt;.EndsWith(Size: 4)

#### 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	arm64
OS	ubuntu 22.04
Queue	AmpereUbuntu
Baseline	d98af689a245bbc983ea71c52e15ff9cdf376ec7
Compare	7b54246a7bd6b4ea09895b22ba30e45059fbedb4
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
SequenceEqual - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	58.63 ns	66.41 ns	1.13	0.01	True
EndsWith - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	3.42 ns	5.25 ns	1.53	0.57	True
EndsWith - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	31.62 ns	34.48 ns	1.09	0.16	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
EndsWith - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	57.88 ns	64.75 ns	1.12	0.03	True
StartsWith - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	56.57 ns	64.96 ns	1.15	0.01	True
SequenceEqual - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	108.09 ns	127.47 ns	1.18	0.01	True
EndsWith - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	3.62 ns	5.11 ns	1.41	0.55	True

Uh oh!

[Perf] Linux/arm64: 7 Regressions on 2/23/2024 10:12:07 PM #99121

Description

Run Information

Regressions in System.Memory.Span<Char>

Repro

Payloads

System.Memory.Span<Char>.SequenceEqual(Size: 512)

ETL Files

Histogram

JIT Disasms

System.Memory.Span<Char>.EndsWith(Size: 4)

ETL Files

Histogram

JIT Disasms

System.Memory.Span<Char>.EndsWith(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Memory.Span<Int32>

Repro

Payloads

System.Memory.Span<Int32>.EndsWith(Size: 512)

ETL Files

Histogram

JIT Disasms

System.Memory.Span<Int32>.StartsWith(Size: 512)

ETL Files

Histogram

JIT Disasms

System.Memory.Span<Int32>.SequenceEqual(Size: 512)

ETL Files

Histogram

JIT Disasms

System.Memory.Span<Int32>.EndsWith(Size: 4)

ETL Files

Histogram

JIT Disasms

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