[Perf] Linux/x64: 112 Regressions on 7/21/2025 8:48:10 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [88f2361c958affeaaa24122780fecb680365b558](https://github.com/dotnet/runtime/commit/88f2361c958affeaaa24122780fecb680365b558)
Compare | [4314b63e2faed4e3f6639f48894810193b94f0c9](https://github.com/dotnet/runtime/commit/4314b63e2faed4e3f6639f48894810193b94f0c9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/88f2361c958affeaaa24122780fecb680365b558...4314b63e2faed4e3f6639f48894810193b94f0c9)
Configs | CompilationMode:tiered, LLVM:false, MonoAOT:false, MonoInterpreter:true, RunKind:micro_mono


### Regressions in System.Memory.Slice&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[MemoryStartSpan - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_RunKind=micro_mono/ViperUbuntu/System.Memory.Slice(String).MemoryStartSpan.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Slice.cs#L108-#L123>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 52.13 ns | 61.63 ns | 1.18 | 0.13 | False | | |
|<ul><li>[ReadOnlyMemorySpanStart - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_RunKind=micro_mono/ViperUbuntu/System.Memory.Slice(String).ReadOnlyMemorySpanStart.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Slice.cs#L261-#L276>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 46.33 ns | 56.59 ns | 1.22 | 0.20 | False | | |
|<ul><li>[MemoryStart - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_RunKind=micro_mono/ViperUbuntu/System.Memory.Slice(String).MemoryStart.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Slice.cs#L91-#L106>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 23.14 ns | 28.12 ns | 1.22 | 0.24 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_LLVM%3Dfalse_MonoAOT%3Dfalse_MonoInterpreter%3Dtrue_RunKind%3Dmicro_mono/ViperUbuntu_Regression/System.Memory.Slice%28String%29_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_LLVM%3Dfalse_MonoAOT%3Dfalse_MonoInterpreter%3Dtrue_RunKind%3Dmicro_mono/ViperUbuntu_Regression/System.Memory.Slice%28String%29_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_LLVM%3Dfalse_MonoAOT%3Dfalse_MonoInterpreter%3Dtrue_RunKind%3Dmicro_mono/ViperUbuntu_Regression/System.Memory.Slice%28String%29_003.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_LLVM%3Dfalse_MonoAOT%3Dfalse_MonoInterpreter%3Dtrue_RunKind%3Dmicro_mono/ViperUbuntu_Regression/System.Memory.Slice%28String%29.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

<details>
<summary>Repro Steps</summary>


#### Prerequisites (Build files either built locally or downloaded from payload above)
- Libraries build extracted to `runtime/artifacts` or build instructions: [Libraries README](https://github.com/dotnet/runtime/blob/main/docs/workflow/building/libraries/README.md) args: `-subset libs+libs.tests -rc release -configuration Release -arch $RunArch -framework net8.0`
- CoreCLR product build extracted to `runtime/artifacts/bin/coreclr/$RunOS.$RunArch.Release`, build instructions: [CoreCLR README](https://github.com/dotnet/runtime/blob/main/docs/workflow/building/coreclr/README.md) args: `-subset clr+libs -rc release -configuration Release -arch $RunArch -framework net8.0`
- Mono Runtime build extracted to `runtime/artifacts/bin/mono/$RunOS.$RunArch.Release`, build instructions: [MONO README](https://github.com/dotnet/runtime/blob/main/docs/workflow/building/mono/README.md) args: `-arch $RunArch -os $RunOS -s mono+libs+host+packs -c Release`
- Dotnet SDK installed for dotnet commands
- Running commands from the runtime folder

Linux
```cmd
# Set $RunDir to the runtime directory
RunDir=`pwd`

# Set the OS, arch, and OSId
RunOS='linux'
RunOSId='linux'
RunArch='x64'

# Create mono dotnet
mkdir -p $RunDir/artifacts/dotnet-mono
$RunDir/build.sh -subset libs.pretest -configuration release -ci -arch $RunArch -testscope innerloop /p:RuntimeArtifactsPath=$RunDir/artifacts/bin/mono/$RunOS.$RunArch.Release /p:RuntimeFlavor=mono
cp $RunDir/artifacts/bin/runtime/net8.0-$RunOS-Release-$RunArch/* $RunDir/artifacts/bin/testhost/net8.0-$RunOS-Release-$RunArch/shared/Microsoft.NETCore.App/8.0.0 -rf
cp $RunDir/artifacts/bin/testhost/net8.0-$RunOS-Release-$RunArch/* $RunDir/artifacts/dotnet-mono -r
cp $RunDir/artifacts/bin/coreclr/$RunOS.$RunArch.Release/corerun $RunDir/artifacts/dotnet-mono/shared/Microsoft.NETCore.App/8.0.0/corerun

# Create Core Root
$RunDir/src/tests/build.sh release $RunArch generatelayoutonly /p:LibrariesConfiguration=Release

# Clone performance
git clone --branch main --depth 1 --quiet https://github.com/dotnet/performance.git $RunDir/performance

# Use Interpreter
export MONO_ENV_OPTIONS="--interpreter"

# One line run:
python3 $RunDir/performance/scripts/benchmarks_ci.py --csproj $RunDir/performance/src/benchmarks/micro/MicroBenchmarks.csproj --incremental no --architecture $RunArch -f net8.0 --filter 'System.Memory.Slice&lt;String&gt;*' --bdn-artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoInterpreter NoMono --logBuildOutput --generateBinLog --corerun $RunDir/artifacts/dotnet-mono/shared/Microsoft.NETCore.App/8.0.0/corerun"

# Individual Commands:
# Restore
dotnet restore $RunDir/performance/src/benchmarks/micro/MicroBenchmarks.csproj --packages $RunDir/performance/artifacts/packages /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1

# Build
dotnet build $RunDir/performance/src/benchmarks/micro/MicroBenchmarks.csproj --configuration Release --framework net8.0 --no-restore /p:NuGetPackageRoot=$RunDir/performance/artifacts/packages /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1

# Run
dotnet run --project $RunDir/performance/src/benchmarks/micro/MicroBenchmarks.csproj --configuration Release --framework net8.0 --no-restore --no-build -- --filter 'System.Memory.Slice&lt;String&gt;*' --anyCategories Libraries Runtime " --category-exclusion-filter NoInterpreter NoMono --logBuildOutput --generateBinLog --corerun $RunDir/artifacts/dotnet-mono/shared/Microsoft.NETCore.App/8.0.0/corerun --artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --packages $RunDir/performance/artifacts/packages
```

Windows
```cmd
# Set $RunDir to the runtime directory
$RunDir="FullPathHere"

# Set the OS, arch, and OSId
RunOS='windows'
RunOSId='win'
RunArch='x64'

# Create mono dotnet
mkdir -p $RunDir/artifacts/dotnet-mono
$RunDir/build.sh -subset libs.pretest -configuration release -ci -arch $RunArch -testscope innerloop /p:RuntimeArtifactsPath=$RunDir\artifacts\bin\mono\$RunOS.$RunArch.Release /p:RuntimeFlavor=mono
xcopy $RunDir\artifacts\bin\runtime\net8.0-$RunOS-Release-$RunArch\ $RunDir\artifacts\bin\testhost\net8.0-$RunOS-Release-$RunArch\shared\Microsoft.NETCore.App\8.0.0\ /e /y
xcopy $RunDir\artifacts\bin\testhost\net8.0-$RunOS-Release-$RunArch\ $RunDir\artifacts\dotnet-mono\ /e /y
xcopy $RunDir\artifacts\bin\coreclr\$RunOS.$RunArch.Release\corerun $RunDir\artifacts\dotnet-mono\shared\Microsoft.NETCore.App\8.0.0\corerun /y

# Create Core Root
$RunDir\src\tests\build.cmd release $RunArch generatelayoutonly /p:LibrariesConfiguration=Release

# Clone performance
git clone --branch main --depth 1 --quiet https://github.com/dotnet/performance.git $RunDir\performance

# Use Interpreter
export MONO_ENV_OPTIONS="--interpreter"

# One line run:
python3 $RunDir\performance\scripts\benchmarks_ci.py --csproj $RunDir\performance\src\benchmarks\micro\MicroBenchmarks.csproj --incremental no --architecture $RunArch -f net8.0 --filter 'System.Memory.Slice&lt;String&gt;*' --bdn-artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoInterpreter NoMono --logBuildOutput --generateBinLog --corerun $RunDir\artifacts\dotnet-mono\shared\Microsoft.NETCore.App\8.0.0\corerun.exe"

# Individual Commands:
# Restore
dotnet restore $RunDir\performance\src\benchmarks\micro\MicroBenchmarks.csproj --packages $RunDir\performance\artifacts\packages /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1

# Build
dotnet build $RunDir\performance\src\benchmarks\micro\MicroBenchmarks.csproj --configuration Release --framework net8.0 --no-restore /p:NuGetPackageRoot=$RunDir\performance\artifacts\packages /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1

# Run
dotnet run --project $RunDir\performance\src\benchmarks\micro\MicroBenchmarks.csproj --configuration Release --framework net8.0 --no-restore --no-build -- --filter 'System.Memory.Slice&lt;String&gt;*' --anyCategories Libraries Runtime " --category-exclusion-filter NoInterpreter NoMono --logBuildOutput --generateBinLog --corerun $RunDir\artifacts\dotnet-mono\shared\Microsoft.NETCore.App\8.0.0\corerun.exe --artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --packages $RunDir\performance\artifacts\packages
```

</details>

<details>

### System.Memory.Slice&lt;String&gt;.MemoryStartSpan

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Slice&lt;String&gt;.ReadOnlyMemorySpanStart

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Slice&lt;String&gt;.MemoryStart

#### 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 | [88f2361c958affeaaa24122780fecb680365b558](https://github.com/dotnet/runtime/commit/88f2361c958affeaaa24122780fecb680365b558)
Compare | [4314b63e2faed4e3f6639f48894810193b94f0c9](https://github.com/dotnet/runtime/commit/4314b63e2faed4e3f6639f48894810193b94f0c9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/88f2361c958affeaaa24122780fecb680365b558...4314b63e2faed4e3f6639f48894810193b94f0c9)
Configs | CompilationMode:tiered, LLVM:false, MonoAOT:false, MonoInterpreter:true, RunKind:micro_mono


### Regressions in System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Count - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_RunKind=micro_mono/ViperUbuntu/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern%3a%20%22(%3fi)Sher%5ba-z%5d%2b%7cHol%5ba-z%5d%2b%22%2c%20Options%3a%20NonBacktracking).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.RegularExpressions/Perf.Regex.Industry.cs#L193-#L195>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 22.85 ms | 27.48 ms | 1.20 | 0.05 | False | | |
|<ul><li>[Count - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_RunKind=micro_mono/ViperUbuntu/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern%3a%20%22(%3fi)Sher%5ba-z%5d%2b%7cHol%5ba-z%5d%2b%22%2c%20Options%3a%20Compiled).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.RegularExpressions/Perf.Regex.Industry.cs#L193-#L195>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 22.98 ms | 27.18 ms | 1.18 | 0.10 | False | | |
|<ul><li>[Count - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_RunKind=micro_mono/ViperUbuntu/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern%3a%20%22(%3fi)Sherlock%7cHolmes%7cWatson%22%2c%20Options%3a%20NonBacktracking).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.RegularExpressions/Perf.Regex.Industry.cs#L193-#L195>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 22.38 ms | 25.81 ms | 1.15 | 0.06 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_LLVM%3Dfalse_MonoAOT%3Dfalse_MonoInterpreter%3Dtrue_RunKind%3Dmicro_mono/ViperUbuntu_Regression/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_LLVM%3Dfalse_MonoAOT%3Dfalse_MonoInterpreter%3Dtrue_RunKind%3Dmicro_mono/ViperUbuntu_Regression/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_LLVM%3Dfalse_MonoAOT%3Dfalse_MonoInterpreter%3Dtrue_RunKind%3Dmicro_mono/ViperUbuntu_Regression/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock_003.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_LLVM%3Dfalse_MonoAOT%3Dfalse_MonoInterpreter%3Dtrue_RunKind%3Dmicro_mono/ViperUbuntu_Regression/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

<details>
<summary>Repro Steps</summary>


#### Prerequisites (Build files either built locally or downloaded from payload above)
- Libraries build extracted to `runtime/artifacts` or build instructions: [Libraries README](https://github.com/dotnet/runtime/blob/main/docs/workflow/building/libraries/README.md) args: `-subset libs+libs.tests -rc release -configuration Release -arch $RunArch -framework net8.0`
- CoreCLR product build extracted to `runtime/artifacts/bin/coreclr/$RunOS.$RunArch.Release`, build instructions: [CoreCLR README](https://github.com/dotnet/runtime/blob/main/docs/workflow/building/coreclr/README.md) args: `-subset clr+libs -rc release -configuration Release -arch $RunArch -framework net8.0`
- Mono Runtime build extracted to `runtime/artifacts/bin/mono/$RunOS.$RunArch.Release`, build instructions: [MONO README](https://github.com/dotnet/runtime/blob/main/docs/workflow/building/mono/README.md) args: `-arch $RunArch -os $RunOS -s mono+libs+host+packs -c Release`
- Dotnet SDK installed for dotnet commands
- Running commands from the runtime folder

Linux
```cmd
# Set $RunDir to the runtime directory
RunDir=`pwd`

# Set the OS, arch, and OSId
RunOS='linux'
RunOSId='linux'
RunArch='x64'

# Create mono dotnet
mkdir -p $RunDir/artifacts/dotnet-mono
$RunDir/build.sh -subset libs.pretest -configuration release -ci -arch $RunArch -testscope innerloop /p:RuntimeArtifactsPath=$RunDir/artifacts/bin/mono/$RunOS.$RunArch.Release /p:RuntimeFlavor=mono
cp $RunDir/artifacts/bin/runtime/net8.0-$RunOS-Release-$RunArch/* $RunDir/artifacts/bin/testhost/net8.0-$RunOS-Release-$RunArch/shared/Microsoft.NETCore.App/8.0.0 -rf
cp $RunDir/artifacts/bin/testhost/net8.0-$RunOS-Release-$RunArch/* $RunDir/artifacts/dotnet-mono -r
cp $RunDir/artifacts/bin/coreclr/$RunOS.$RunArch.Release/corerun $RunDir/artifacts/dotnet-mono/shared/Microsoft.NETCore.App/8.0.0/corerun

# Create Core Root
$RunDir/src/tests/build.sh release $RunArch generatelayoutonly /p:LibrariesConfiguration=Release

# Clone performance
git clone --branch main --depth 1 --quiet https://github.com/dotnet/performance.git $RunDir/performance

# Use Interpreter
export MONO_ENV_OPTIONS="--interpreter"

# One line run:
python3 $RunDir/performance/scripts/benchmarks_ci.py --csproj $RunDir/performance/src/benchmarks/micro/MicroBenchmarks.csproj --incremental no --architecture $RunArch -f net8.0 --filter 'System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock*' --bdn-artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoInterpreter NoMono --logBuildOutput --generateBinLog --corerun $RunDir/artifacts/dotnet-mono/shared/Microsoft.NETCore.App/8.0.0/corerun"

# Individual Commands:
# Restore
dotnet restore $RunDir/performance/src/benchmarks/micro/MicroBenchmarks.csproj --packages $RunDir/performance/artifacts/packages /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1

# Build
dotnet build $RunDir/performance/src/benchmarks/micro/MicroBenchmarks.csproj --configuration Release --framework net8.0 --no-restore /p:NuGetPackageRoot=$RunDir/performance/artifacts/packages /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1

# Run
dotnet run --project $RunDir/performance/src/benchmarks/micro/MicroBenchmarks.csproj --configuration Release --framework net8.0 --no-restore --no-build -- --filter 'System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock*' --anyCategories Libraries Runtime " --category-exclusion-filter NoInterpreter NoMono --logBuildOutput --generateBinLog --corerun $RunDir/artifacts/dotnet-mono/shared/Microsoft.NETCore.App/8.0.0/corerun --artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --packages $RunDir/performance/artifacts/packages
```

Windows
```cmd
# Set $RunDir to the runtime directory
$RunDir="FullPathHere"

# Set the OS, arch, and OSId
RunOS='windows'
RunOSId='win'
RunArch='x64'

# Create mono dotnet
mkdir -p $RunDir/artifacts/dotnet-mono
$RunDir/build.sh -subset libs.pretest -configuration release -ci -arch $RunArch -testscope innerloop /p:RuntimeArtifactsPath=$RunDir\artifacts\bin\mono\$RunOS.$RunArch.Release /p:RuntimeFlavor=mono
xcopy $RunDir\artifacts\bin\runtime\net8.0-$RunOS-Release-$RunArch\ $RunDir\artifacts\bin\testhost\net8.0-$RunOS-Release-$RunArch\shared\Microsoft.NETCore.App\8.0.0\ /e /y
xcopy $RunDir\artifacts\bin\testhost\net8.0-$RunOS-Release-$RunArch\ $RunDir\artifacts\dotnet-mono\ /e /y
xcopy $RunDir\artifacts\bin\coreclr\$RunOS.$RunArch.Release\corerun $RunDir\artifacts\dotnet-mono\shared\Microsoft.NETCore.App\8.0.0\corerun /y

# Create Core Root
$RunDir\src\tests\build.cmd release $RunArch generatelayoutonly /p:LibrariesConfiguration=Release

# Clone performance
git clone --branch main --depth 1 --quiet https://github.com/dotnet/performance.git $RunDir\performance

# Use Interpreter
export MONO_ENV_OPTIONS="--interpreter"

# One line run:
python3 $RunDir\performance\scripts\benchmarks_ci.py --csproj $RunDir\performance\src\benchmarks\micro\MicroBenchmarks.csproj --incremental no --architecture $RunArch -f net8.0 --filter 'System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock*' --bdn-artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoInterpreter NoMono --logBuildOutput --generateBinLog --corerun $RunDir\artifacts\dotnet-mono\shared\Microsoft.NETCore.App\8.0.0\corerun.exe"

# Individual Commands:
# Restore
dotnet restore $RunDir\performance\src\benchmarks\micro\MicroBenchmarks.csproj --packages $RunDir\performance\artifacts\packages /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1

# Build
dotnet build $RunDir\performance\src\benchmarks\micro\MicroBenchmarks.csproj --configuration Release --framework net8.0 --no-restore /p:NuGetPackageRoot=$RunDir\performance\artifacts\packages /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1

# Run
dotnet run --project $RunDir\performance\src\benchmarks\micro\MicroBenchmarks.csproj --configuration Release --framework net8.0 --no-restore --no-build -- --filter 'System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock*' --anyCategories Libraries Runtime " --category-exclusion-filter NoInterpreter NoMono --logBuildOutput --generateBinLog --corerun $RunDir\artifacts\dotnet-mono\shared\Microsoft.NETCore.App\8.0.0\corerun.exe --artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --packages $RunDir\performance\artifacts\packages
```

</details>

<details>

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "(?i)Sher[a-z]+|Hol[a-z]+", Options: NonBacktracking)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "(?i)Sher[a-z]+|Hol[a-z]+", Options: Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "(?i)Sherlock|Holmes|Watson", Options: NonBacktracking)

#### 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	88f2361c958affeaaa24122780fecb680365b558
Compare	4314b63e2faed4e3f6639f48894810193b94f0c9
Diff	Diff
Configs	CompilationMode:tiered, LLVM:false, MonoAOT:false, MonoInterpreter:true, RunKind:micro_mono

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
MemoryStartSpan - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	52.13 ns	61.63 ns	1.18	0.13	False
ReadOnlyMemorySpanStart - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	46.33 ns	56.59 ns	1.22	0.20	False
MemoryStart - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	23.14 ns	28.12 ns	1.22	0.24	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
Count - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	22.85 ms	27.48 ms	1.20	0.05	False
Count - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	22.98 ms	27.18 ms	1.18	0.10	False
Count - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	22.38 ms	25.81 ms	1.15	0.06	False

[Perf] Linux/x64: 112 Regressions on 7/21/2025 8:48:10 PM +00:00 #59874

Description

Run Information

Regressions in System.Memory.Slice<String>

Repro

Prerequisites (Build files either built locally or downloaded from payload above)

System.Memory.Slice<String>.MemoryStartSpan

ETL Files

Histogram

JIT Disasms

System.Memory.Slice<String>.ReadOnlyMemorySpanStart

ETL Files

Histogram

JIT Disasms

System.Memory.Slice<String>.MemoryStart

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock

Repro

Prerequisites (Build files either built locally or downloaded from payload above)

System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "(?i)Sher[a-z]+|Hol[a-z]+", Options: NonBacktracking)

ETL Files

Histogram

JIT Disasms

System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "(?i)Sher[a-z]+|Hol[a-z]+", Options: Compiled)

ETL Files

Histogram

JIT Disasms

System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "(?i)Sherlock|Holmes|Watson", Options: NonBacktracking)

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions