[Perf] Linux/x64: 4 Improvements on 4/30/2025 2:49:21 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | TigerUbuntu
Baseline | [f7af766fdd6c56921164f656592f32a2074428be](https://github.com/dotnet/runtime/commit/f7af766fdd6c56921164f656592f32a2074428be)
Compare | [dbb3f759798208ca7463059e0c87c0f45704b62f](https://github.com/dotnet/runtime/commit/dbb3f759798208ca7463059e0c87c0f45704b62f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f7af766fdd6c56921164f656592f32a2074428be...dbb3f759798208ca7463059e0c87c0f45704b62f)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.IO.Tests.BinaryWriterExtendedTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[WriteAsciiCharArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars%3a%2032).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO/BinaryWriterExtendedTests.cs#L29-#L34>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1STW/bMAy9B8h/4HJRgrmx434M8yBgaRZ0xVYUaIL1rNl0rEGWAopeYqz775Pi5LILBT+Sj498NsjA6BkkfBab3jO288fn+TZAfn6vraL+lTQjrY+MtsJqyJywpS+1XjWKlkSqn26YtN19R7vj5tFG3Bdwnc/Ep/HIhDGqDjRhTqUYWbc4zbP89iq7vsruttnHYrEobvL5h7ssX9zevM+yIstm507CvQuNonJskVPqbOy/8P4kZcsm5glrnzaoKp+2SttLQelsrXdxcm9Vq8vpH7F83ooCBFOHIgGxcu1eG8Xa2SdXYUwdlG9j6qWz37StIhRayYm/UdUD8lft2ZEulfmiWL1qbiKLIu2d9dN4UxlDMuwtTzE5rSJjSM665fAkZ5VyeGbj0Rvsyf3CkmGDpNEncN9pU23D5htW7T6BH8p0KKMhKxdOgvSCvjO8/I2kdjgepekbHBokPDPAu0DO4TAeJhN262NpugonE0hTWB8DpUFwNdTaBK5gJbguuAb+1BwFUfwDCOLxy2AvwyFsDdOhQF5kHktnutbK/+X2A+7lSXeoY80GpQjniyb0588nVL4jbNGymP0DluG5858CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 90.98 ns | 83.29 ns | 0.92 | 0.39 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_06_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro_Improvement/System.IO.Tests.BinaryWriterExtendedTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_06_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro_Improvement/System.IO.Tests.BinaryWriterExtendedTests.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.IO.Tests.BinaryWriterExtendedTests*'
```

<details>

### System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars: 32)

#### 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 | TigerUbuntu
Baseline | [f7af766fdd6c56921164f656592f32a2074428be](https://github.com/dotnet/runtime/commit/f7af766fdd6c56921164f656592f32a2074428be)
Compare | [dbb3f759798208ca7463059e0c87c0f45704b62f](https://github.com/dotnet/runtime/commit/dbb3f759798208ca7463059e0c87c0f45704b62f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f7af766fdd6c56921164f656592f32a2074428be...dbb3f759798208ca7463059e0c87c0f45704b62f)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.Memory.Span&lt;Char&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[IndexOfAnyThreeValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/System.Memory.Span(Char).IndexOfAnyThreeValues(Size%3a%2033).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L84-#L85>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 12.95 ns | 10.15 ns | 0.78 | 0.52 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_06_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro_Improvement/System.Memory.Span%28Char%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_06_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro_Improvement/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>

### System.Memory.Span&lt;Char&gt;.IndexOfAnyThreeValues(Size: 33)

#### 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 | TigerUbuntu
Baseline | [f7af766fdd6c56921164f656592f32a2074428be](https://github.com/dotnet/runtime/commit/f7af766fdd6c56921164f656592f32a2074428be)
Compare | [dbb3f759798208ca7463059e0c87c0f45704b62f](https://github.com/dotnet/runtime/commit/dbb3f759798208ca7463059e0c87c0f45704b62f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f7af766fdd6c56921164f656592f32a2074428be...dbb3f759798208ca7463059e0c87c0f45704b62f)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro


### Improvements in System.IO.Tests.StreamReaderReadLineTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ReadLine - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/System.IO.Tests.StreamReaderReadLineTests.ReadLine(LineLengthRange%3a%20%5b1025%2c%202048%5d).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO/StreamReaderReadLineTests.cs#L24-#L32>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 16.07 μs | 14.74 μs | 0.92 | 0.08 | False | | |
|<ul><li>[ReadLine - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_AOT=true_CompilationMode=wasm_RunKind=micro/System.IO.Tests.StreamReaderReadLineTests.ReadLine(LineLengthRange%3a%20%5b%20%20%200%2c%201024%5d).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO/StreamReaderReadLineTests.cs#L24-#L32>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1STY/TMBC9V+p/GHpxK7JNNpSKDbLEsqwAsauV2goOiINJJomRPyp7TFux/HfsJr1wmZHn482bN1ZIQOgJOLxj25Mn1MvPT8tdDPnllhwKvUHRoEv2QRocMpfXPJkHNB31G2E6rOA7ABQZXBfl6seCvZ1OVJwgWkIXRzSCkKTGeVmUr6+KV1fFelfcVNdltSqXN2/W5bpcvSyKqigWY6fDvY2NrLFkkHIXTOq/4P50wtR9yjtsfd5HVj7XQppLQW1NK7s0+WSElvX8D7t92rEKGLmALAN2Z/VeKkHSmkfbYEodhNcptQnmizRNCsVWZ9nfxOoj0ifpyTpZC/VBkPgmqU8owklvjZ8nOXky2bA3P9vsvApPJht588FlI0s+uMV08gx7Z39hTbBFJ9Fn8D5I1ezi5lsSep/BV6EC8nSLOxslSefxQdHtb3Siw+kkz5/h0KPDEQFeRHCKwniYzcjeH2sVGpzNIM/h/hghFYJtoZUqYknTgQ3xauDPzYmQQxM/ASTx6144gkPcGuZDAb/QPNZWBW34/3RPQ9zzM+9YR5IUchblS0c4jc9HFD441GiILf4BoDEgb5oCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 16.32 μs | 14.29 μs | 0.88 | 0.08 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_06_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro_Improvement/System.IO.Tests.StreamReaderReadLineTests_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_06_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro_Improvement/System.IO.Tests.StreamReaderReadLineTests_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_06_2025/refs/heads/main_x64_ubuntu%2022.04_AOT%3Dtrue_CompilationMode%3Dwasm_RunKind%3Dmicro_Improvement/System.IO.Tests.StreamReaderReadLineTests.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.IO.Tests.StreamReaderReadLineTests*'
```

<details>

### System.IO.Tests.StreamReaderReadLineTests.ReadLine(LineLengthRange: [1025, 2048])

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.StreamReaderReadLineTests.ReadLine(LineLengthRange: [   0, 1024])

#### 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	TigerUbuntu
Baseline	f7af766fdd6c56921164f656592f32a2074428be
Compare	dbb3f759798208ca7463059e0c87c0f45704b62f
Diff	Diff
Configs	AOT:true, CompilationMode:wasm, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ReadLine - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	16.07 μs	14.74 μs	0.92	0.08	False
ReadLine - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	16.32 μs	14.29 μs	0.88	0.08	False

Uh oh!

[Perf] Linux/x64: 4 Improvements on 4/30/2025 2:49:21 PM +00:00 #55072

Description

Run Information

Improvements in System.IO.Tests.BinaryWriterExtendedTests

Repro

System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars: 32)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Memory.Span<Char>

Repro

System.Memory.Span<Char>.IndexOfAnyThreeValues(Size: 33)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.IO.Tests.StreamReaderReadLineTests

Repro

System.IO.Tests.StreamReaderReadLineTests.ReadLine(LineLengthRange: [1025, 2048])

ETL Files

Histogram

JIT Disasms

System.IO.Tests.StreamReaderReadLineTests.ReadLine(LineLengthRange: [ 0, 1024])

ETL Files

Histogram

JIT Disasms

Docs

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