[Perf] Linux/arm64: 32 Improvements on 4/28/2023 7:22:08 PM

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 20.04
Queue | AmpereUbuntu
Baseline | [375cc6d80d3620415309c35d4dbcfc2172f50fab](https://github.com/dotnet/runtime/commit/375cc6d80d3620415309c35d4dbcfc2172f50fab)
Compare | [231f85f754110bea22930effcbd348babec32423](https://github.com/dotnet/runtime/commit/231f85f754110bea22930effcbd348babec32423)
Diff | [Diff](https://github.com/dotnet/runtime/compare/375cc6d80d3620415309c35d4dbcfc2172f50fab...231f85f754110bea22930effcbd348babec32423)
Configs | CompilationMode:tiered, LLVM:false, MonoAOT:true, MonoInterpreter:false, RunKind:micro_mono


### Improvements in System.Memory.Span&lt;Byte&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[LastIndexOfAnyValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Memory.Span(Byte).LastIndexOfAnyValues(Size%3a%20512).html>) | 319.73 ns | 229.89 ns | 0.72 | 0.01 | False | | |
[IndexOfAnyThreeValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Memory.Span(Byte).IndexOfAnyThreeValues(Size%3a%20512).html>) | 377.22 ns | 245.79 ns | 0.65 | 0.01 | False | | |
[IndexOfAnyThreeValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Memory.Span(Byte).IndexOfAnyThreeValues(Size%3a%2033).html>) | 172.06 ns | 36.95 ns | 0.21 | 0.10 | False | | |
[IndexOfAnyFourValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Memory.Span(Byte).IndexOfAnyFourValues(Size%3a%2033).html>) | 200.14 ns | 46.39 ns | 0.23 | 0.03 | False | | |
[IndexOfAnyFourValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Memory.Span(Byte).IndexOfAnyFourValues(Size%3a%20512).html>) | 413.12 ns | 265.26 ns | 0.64 | 0.02 | False | | |
[IndexOfAnyFiveValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Memory.Span(Byte).IndexOfAnyFiveValues(Size%3a%2033).html>) | 244.86 ns | 49.61 ns | 0.20 | 0.03 | False | | |
[IndexOfAnyTwoValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Memory.Span(Byte).IndexOfAnyTwoValues(Size%3a%20512).html>) | 325.26 ns | 231.56 ns | 0.71 | 0.01 | True | | |
[IndexOfAnyFiveValues - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Memory.Span(Byte).IndexOfAnyFiveValues(Size%3a%20512).html>) | 469.29 ns | 275.80 ns | 0.59 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.Memory.Span%28Byte%29_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.Memory.Span%28Byte%29_7.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.Memory.Span%28Byte%29.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-1417272a-7d1b-47f5-bfa0-bd3ca867432a503194497ed40309d/ebb5752f-2948-4dcb-85a3-6159ceb2167c.zip?sv=2021-08-06&se=2023-05-28T05%3A35%3A38Z&sr=c&sp=rl&sig=y8FZZqXsISDlsb3wmfa1Cox0kz4%2FDfh2EEDSoY61saE%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2b9e615d-78da-4ada-b017-eb38d0d7f46de9c051845844be898/ad0f1b83-ee02-4823-abba-6f4b6bd9b72a.zip?sv=2021-08-06&se=2023-05-29T01%3A32%3A44Z&sr=c&sp=rl&sig=mcXiug5c6Tp2Wmn1szeThXhEeyYP9i082lmumi8kNg8%3D>)

<details>
   <summary>Repro Steps</summary>


#### Prerequisites (Files either built locally (with build.(sh/cmd) or downloaded from payload above (if same system setup) (in this order))
- 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 $RunArch -framework net8.0`
- AOT MONO build extracted to `runtime/artifacts/bin/mono/$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 /p:CrossBuild=false /p:MonoLLVMUseCxx11Abi=false`
- 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 aot directory 
mkdir -p $RunDir/artifacts/bin/aot/sgen
mkdir -p $RunDir/artifacts/bin/aot/pack
cp -r $RunDir/artifacts/obj/mono/$RunOS.$RunArch.Release/mono/* $RunDir/artifacts/bin/aot/sgen
cp -r $RunDir/artifacts/bin/microsoft.netcore.app.runtime.$RunOS-$RunArch/Release/* $RunDir/artifacts/bin/aot/pack

# 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

# 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.Span&lt;Byte&gt;*' --bdn-artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir/artifacts/bin/aot/sgen/mini/mono-sgen --customruntimepack $RunDir/artifacts/bin/aot/pack --aotcompilermode llvm --logBuildOutput --generateBinLog"

# 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.Span&lt;Byte&gt;* --anyCategories Libraries Runtime " --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir/artifacts/bin/aot/sgen/mini/mono-sgen --customruntimepack $RunDir/artifacts/bin/aot/pack --aotcompilermode llvm --logBuildOutput --generateBinLog " --artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --packages $RunDir/performance/artifacts/packages --buildTimeout 1200
```

Windows
```cmd
# Set $RunDir to the runtime directory
$RunDir="FullPathHere"

# Set the OS, arch, and OSId
RunOS='windows'
RunOSId='win'
RunArch='x64'

# Create aot directory
mkdir $RunDir\artifacts\bin\aot\sgen
mkdir $RunDir\artifacts\bin\aot\pack
xcopy $RunDir\artifacts\obj\mono\$RunOS.$RunArch.Release\mono $RunDir\artifacts\bin\aot\sgen\ /e /y
xcopy $RunDir\artifacts\bin\microsoft.netcore.app.runtime.$RunOSId-$RunArch\Release $RunDir\artifacts\bin\aot\pack\ /e /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

# 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.Span&lt;Byte&gt;*' --bdn-artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir\artifacts\bin\aot\sgen\mini\mono-sgen.exe --customruntimepack $RunDir\artifacts\bin\aot\pack --aotcompilermode llvm --logBuildOutput --generateBinLog"

# 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.Span&lt;Byte&gt;* --anyCategories Libraries Runtime " --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir\artifacts\bin\aot\sgen\mini\mono-sgen.exe --customruntimepack $RunDir\artifacts\bin\aot\pack -aotcompilermode llvm --logBuildOutput --generateBinLog " --artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --packages $RunDir\performance\artifacts\packages --buildTimeout 1200
```

</details>

<details>


### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-1417272a-7d1b-47f5-bfa0-bd3ca867432a503194497ed40309d/ebb5752f-2948-4dcb-85a3-6159ceb2167c.zip?sv=2021-08-06&se=2023-05-28T05%3A35%3A38Z&sr=c&sp=rl&sig=y8FZZqXsISDlsb3wmfa1Cox0kz4%2FDfh2EEDSoY61saE%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2b9e615d-78da-4ada-b017-eb38d0d7f46de9c051845844be898/ad0f1b83-ee02-4823-abba-6f4b6bd9b72a.zip?sv=2021-08-06&se=2023-05-29T01%3A32%3A44Z&sr=c&sp=rl&sig=mcXiug5c6Tp2Wmn1szeThXhEeyYP9i082lmumi8kNg8%3D>)
### Histogram

#### System.Memory.Span&lt;Byte&gt;.LastIndexOfAnyValues(Size: 512)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 229.8941003006807 < 303.5356693064128.
IsChangePoint: Marked as a change because one of 3/10/2023 12:53:36 AM, 4/12/2023 8:39:35 PM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 69.13994644575584 (T) = (0 -243.2133788927007) / Math.Sqrt((385.55641949970914 / (299)) + (19.714755895131535 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.3329084381267554 = (364.58770098925964 - 243.2133788927007) / 364.58770098925964 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Memory.Span&lt;Byte&gt;.IndexOfAnyThreeValues(Size: 512)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 245.79097140021463 < 361.4900605959518.
IsChangePoint: Marked as a change because one of 4/12/2023 8:39:35 PM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 103.0466448427871 (T) = (0 -256.07722466927913) / Math.Sqrt((633.4273218265018 / (299)) + (12.155354738129962 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.4194429354351725 = (441.08880986786176 - 256.07722466927913) / 441.08880986786176 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Memory.Span&lt;Byte&gt;.IndexOfAnyThreeValues(Size: 33)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 36.94629677692893 < 164.37494939773305.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 4.07336275204696 (T) = (0 -47.83974733506966) / Math.Sqrt((2297.8068534847066 / (299)) + (13.425339495218973 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.20261083801861668 = (59.99548227642775 - 47.83974733506966) / 59.99548227642775 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Memory.Span&lt;Byte&gt;.IndexOfAnyFourValues(Size: 33)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 46.39140844953307 < 189.8009363045018.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 5.704924889883067 (T) = (0 -57.35590554894207) / Math.Sqrt((2752.066335702467 / (299)) + (14.485991751473478 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.24393002292517704 = (75.86057810528027 - 57.35590554894207) / 75.86057810528027 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Memory.Span&lt;Byte&gt;.IndexOfAnyFourValues(Size: 512)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 265.26305786280227 < 394.67898261123435.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 74.14620492077586 (T) = (0 -281.83087989920085) / Math.Sqrt((2866.929436416672 / (299)) + (33.92041536419218 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.4836138123272347 = (545.7754034230627 - 281.83087989920085) / 545.7754034230627 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Memory.Span&lt;Byte&gt;.IndexOfAnyFiveValues(Size: 33)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 49.60938748039751 < 232.9924069204933.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 7.687061545439139 (T) = (0 -59.31864330458853) / Math.Sqrt((4186.118290353213 / (299)) + (11.058978444994272 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.3342181644679864 = (89.09621761787497 - 59.31864330458853) / 89.09621761787497 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Memory.Span&lt;Byte&gt;.IndexOfAnyTwoValues(Size: 512)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 231.56332384328616 < 308.2989627387257.
IsChangePoint: Marked as a change because one of 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 49.589064782804556 (T) = (0 -246.46719842825314) / Math.Sqrt((10.662926149611096 / (299)) + (32.41598727744127 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.2578705604937988 = (332.1081004309002 - 246.46719842825314) / 332.1081004309002 is greater than 0.05.
IsChangeEdgeDetector: Marked as regression because Edge Detector said so.

```
### JIT Disasms

#### System.Memory.Span&lt;Byte&gt;.IndexOfAnyFiveValues(Size: 512)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 275.80414869763075 < 447.3904949230281.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 82.3431092499745 (T) = (0 -286.887047022449) / Math.Sqrt((5663.59847250277 / (299)) + (14.534954271955806 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.5637040155008389 = (657.5514265889391 - 286.887047022449) / 657.5514265889391 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### 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 20.04
Queue | AmpereUbuntu
Baseline | [375cc6d80d3620415309c35d4dbcfc2172f50fab](https://github.com/dotnet/runtime/commit/375cc6d80d3620415309c35d4dbcfc2172f50fab)
Compare | [231f85f754110bea22930effcbd348babec32423](https://github.com/dotnet/runtime/commit/231f85f754110bea22930effcbd348babec32423)
Diff | [Diff](https://github.com/dotnet/runtime/compare/375cc6d80d3620415309c35d4dbcfc2172f50fab...231f85f754110bea22930effcbd348babec32423)
Configs | CompilationMode:tiered, LLVM:false, MonoAOT:true, MonoInterpreter:false, RunKind:micro_mono


### Improvements in System.Globalization.Tests.StringSearch

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[IsSuffix_DifferentLastChar - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options%3a%20(en-US%2c%20OrdinalIgnoreCase%2c%20False)).html>) | 3.41 μs | 741.57 ns | 0.22 | 0.01 | False | | |
[IsPrefix_FirstHalf - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options%3a%20(en-US%2c%20OrdinalIgnoreCase%2c%20False)).html>) | 1.72 μs | 373.42 ns | 0.22 | 0.01 | False | | |
[IsSuffix_SecondHalf - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Globalization.Tests.StringSearch.IsSuffix_SecondHalf(Options%3a%20(en-US%2c%20OrdinalIgnoreCase%2c%20False)).html>) | 1.72 μs | 370.54 ns | 0.22 | 0.01 | False | | |
[IsPrefix_DifferentFirstChar - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.Globalization.Tests.StringSearch.IsPrefix_DifferentFirstChar(Options%3a%20(en-US%2c%20OrdinalIgnoreCase%2c%20False)).html>) | 145.38 ns | 44.13 ns | 0.30 | 0.08 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.Globalization.Tests.StringSearch_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.Globalization.Tests.StringSearch_2.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.Globalization.Tests.StringSearch.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-1417272a-7d1b-47f5-bfa0-bd3ca867432a503194497ed40309d/ebb5752f-2948-4dcb-85a3-6159ceb2167c.zip?sv=2021-08-06&se=2023-05-28T05%3A35%3A38Z&sr=c&sp=rl&sig=y8FZZqXsISDlsb3wmfa1Cox0kz4%2FDfh2EEDSoY61saE%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2b9e615d-78da-4ada-b017-eb38d0d7f46de9c051845844be898/ad0f1b83-ee02-4823-abba-6f4b6bd9b72a.zip?sv=2021-08-06&se=2023-05-29T01%3A32%3A44Z&sr=c&sp=rl&sig=mcXiug5c6Tp2Wmn1szeThXhEeyYP9i082lmumi8kNg8%3D>)

<details>
   <summary>Repro Steps</summary>


#### Prerequisites (Files either built locally (with build.(sh/cmd) or downloaded from payload above (if same system setup) (in this order))
- 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 $RunArch -framework net8.0`
- AOT MONO build extracted to `runtime/artifacts/bin/mono/$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 /p:CrossBuild=false /p:MonoLLVMUseCxx11Abi=false`
- 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 aot directory 
mkdir -p $RunDir/artifacts/bin/aot/sgen
mkdir -p $RunDir/artifacts/bin/aot/pack
cp -r $RunDir/artifacts/obj/mono/$RunOS.$RunArch.Release/mono/* $RunDir/artifacts/bin/aot/sgen
cp -r $RunDir/artifacts/bin/microsoft.netcore.app.runtime.$RunOS-$RunArch/Release/* $RunDir/artifacts/bin/aot/pack

# 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

# 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.Globalization.Tests.StringSearch*' --bdn-artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir/artifacts/bin/aot/sgen/mini/mono-sgen --customruntimepack $RunDir/artifacts/bin/aot/pack --aotcompilermode llvm --logBuildOutput --generateBinLog"

# 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.Globalization.Tests.StringSearch* --anyCategories Libraries Runtime " --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir/artifacts/bin/aot/sgen/mini/mono-sgen --customruntimepack $RunDir/artifacts/bin/aot/pack --aotcompilermode llvm --logBuildOutput --generateBinLog " --artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --packages $RunDir/performance/artifacts/packages --buildTimeout 1200
```

Windows
```cmd
# Set $RunDir to the runtime directory
$RunDir="FullPathHere"

# Set the OS, arch, and OSId
RunOS='windows'
RunOSId='win'
RunArch='x64'

# Create aot directory
mkdir $RunDir\artifacts\bin\aot\sgen
mkdir $RunDir\artifacts\bin\aot\pack
xcopy $RunDir\artifacts\obj\mono\$RunOS.$RunArch.Release\mono $RunDir\artifacts\bin\aot\sgen\ /e /y
xcopy $RunDir\artifacts\bin\microsoft.netcore.app.runtime.$RunOSId-$RunArch\Release $RunDir\artifacts\bin\aot\pack\ /e /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

# 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.Globalization.Tests.StringSearch*' --bdn-artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir\artifacts\bin\aot\sgen\mini\mono-sgen.exe --customruntimepack $RunDir\artifacts\bin\aot\pack --aotcompilermode llvm --logBuildOutput --generateBinLog"

# 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.Globalization.Tests.StringSearch* --anyCategories Libraries Runtime " --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir\artifacts\bin\aot\sgen\mini\mono-sgen.exe --customruntimepack $RunDir\artifacts\bin\aot\pack -aotcompilermode llvm --logBuildOutput --generateBinLog " --artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --packages $RunDir\performance\artifacts\packages --buildTimeout 1200
```

</details>

<details>


### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-1417272a-7d1b-47f5-bfa0-bd3ca867432a503194497ed40309d/ebb5752f-2948-4dcb-85a3-6159ceb2167c.zip?sv=2021-08-06&se=2023-05-28T05%3A35%3A38Z&sr=c&sp=rl&sig=y8FZZqXsISDlsb3wmfa1Cox0kz4%2FDfh2EEDSoY61saE%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2b9e615d-78da-4ada-b017-eb38d0d7f46de9c051845844be898/ad0f1b83-ee02-4823-abba-6f4b6bd9b72a.zip?sv=2021-08-06&se=2023-05-29T01%3A32%3A44Z&sr=c&sp=rl&sig=mcXiug5c6Tp2Wmn1szeThXhEeyYP9i082lmumi8kNg8%3D>)
### Histogram

#### System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options: (en-US, OrdinalIgnoreCase, False))

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 741.5660266117162 < 3.2415549677045945.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 12.380050627161038 (T) = (0 -737.5672800779557) / Math.Sqrt((740189.4214497829 / (299)) + (6.09624124178183 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.455108679926189 = (1353.6043847753801 - 737.5672800779557) / 1353.6043847753801 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options: (en-US, OrdinalIgnoreCase, False))

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 373.423408557272 < 1.6341837012368605.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 12.708716712407265 (T) = (0 -368.6515890668631) / Math.Sqrt((191735.35173415157 / (299)) + (3.13226486393792 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.4661448737813825 = (690.5461256466377 - 368.6515890668631) / 690.5461256466377 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Globalization.Tests.StringSearch.IsSuffix_SecondHalf(Options: (en-US, OrdinalIgnoreCase, False))

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 370.5354211834059 < 1.636571540178377.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 12.591508687414894 (T) = (0 -372.4331009242467) / Math.Sqrt((190842.94927576478 / (299)) + (8.567519160242663 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.4608195620225443 = (690.7392677696124 - 372.4331009242467) / 690.7392677696124 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.Globalization.Tests.StringSearch.IsPrefix_DifferentFirstChar(Options: (en-US, OrdinalIgnoreCase, False))

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 44.12994447926596 < 138.38699941443727.
IsChangePoint: Marked as a change because one of 4/12/2023 6:21:10 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 4.757160746682251 (T) = (0 -44.62298655938136) / Math.Sqrt((1526.540536895878 / (299)) + (1.2249665974629802 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.19581618514631538 = (55.48854097181773 - 44.62298655938136) / 55.48854097181773 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### 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 20.04
Queue | AmpereUbuntu
Baseline | [375cc6d80d3620415309c35d4dbcfc2172f50fab](https://github.com/dotnet/runtime/commit/375cc6d80d3620415309c35d4dbcfc2172f50fab)
Compare | [231f85f754110bea22930effcbd348babec32423](https://github.com/dotnet/runtime/commit/231f85f754110bea22930effcbd348babec32423)
Diff | [Diff](https://github.com/dotnet/runtime/compare/375cc6d80d3620415309c35d4dbcfc2172f50fab...231f85f754110bea22930effcbd348babec32423)
Configs | CompilationMode:tiered, LLVM:false, MonoAOT:true, MonoInterpreter:false, RunKind:micro_mono


### Improvements in System.IO.Tests.BinaryWriterExtendedTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[WriteAsciiCharArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars%3a%202000000).html>) | 5.45 ms | 4.00 ms | 0.73 | 0.02 | False | | |
[WriteAsciiString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiString(StringLengthInChars%3a%208000).html>) | 19.80 μs | 14.21 μs | 0.72 | 0.01 | False | | |
[WriteAsciiCharArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04_LLVM=false_MonoAOT=true_MonoInterpreter=false_RunKind=micro_mono/System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars%3a%208000).html>) | 19.95 μs | 14.55 μs | 0.73 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.IO.Tests.BinaryWriterExtendedTests_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.IO.Tests.BinaryWriterExtendedTests_2.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_02_2023/refs/heads/main_arm64_ubuntu%2020.04_LLVM%3Dfalse_MonoAOT%3Dtrue_MonoInterpreter%3Dfalse_RunKind%3Dmicro_mono_Improvement/System.IO.Tests.BinaryWriterExtendedTests.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-1417272a-7d1b-47f5-bfa0-bd3ca867432a503194497ed40309d/ebb5752f-2948-4dcb-85a3-6159ceb2167c.zip?sv=2021-08-06&se=2023-05-28T05%3A35%3A38Z&sr=c&sp=rl&sig=y8FZZqXsISDlsb3wmfa1Cox0kz4%2FDfh2EEDSoY61saE%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2b9e615d-78da-4ada-b017-eb38d0d7f46de9c051845844be898/ad0f1b83-ee02-4823-abba-6f4b6bd9b72a.zip?sv=2021-08-06&se=2023-05-29T01%3A32%3A44Z&sr=c&sp=rl&sig=mcXiug5c6Tp2Wmn1szeThXhEeyYP9i082lmumi8kNg8%3D>)

<details>
   <summary>Repro Steps</summary>


#### Prerequisites (Files either built locally (with build.(sh/cmd) or downloaded from payload above (if same system setup) (in this order))
- 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 $RunArch -framework net8.0`
- AOT MONO build extracted to `runtime/artifacts/bin/mono/$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 /p:CrossBuild=false /p:MonoLLVMUseCxx11Abi=false`
- 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 aot directory 
mkdir -p $RunDir/artifacts/bin/aot/sgen
mkdir -p $RunDir/artifacts/bin/aot/pack
cp -r $RunDir/artifacts/obj/mono/$RunOS.$RunArch.Release/mono/* $RunDir/artifacts/bin/aot/sgen
cp -r $RunDir/artifacts/bin/microsoft.netcore.app.runtime.$RunOS-$RunArch/Release/* $RunDir/artifacts/bin/aot/pack

# 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

# 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.IO.Tests.BinaryWriterExtendedTests*' --bdn-artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir/artifacts/bin/aot/sgen/mini/mono-sgen --customruntimepack $RunDir/artifacts/bin/aot/pack --aotcompilermode llvm --logBuildOutput --generateBinLog"

# 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.IO.Tests.BinaryWriterExtendedTests* --anyCategories Libraries Runtime " --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir/artifacts/bin/aot/sgen/mini/mono-sgen --customruntimepack $RunDir/artifacts/bin/aot/pack --aotcompilermode llvm --logBuildOutput --generateBinLog " --artifacts $RunDir/artifacts/BenchmarkDotNet.Artifacts --packages $RunDir/performance/artifacts/packages --buildTimeout 1200
```

Windows
```cmd
# Set $RunDir to the runtime directory
$RunDir="FullPathHere"

# Set the OS, arch, and OSId
RunOS='windows'
RunOSId='win'
RunArch='x64'

# Create aot directory
mkdir $RunDir\artifacts\bin\aot\sgen
mkdir $RunDir\artifacts\bin\aot\pack
xcopy $RunDir\artifacts\obj\mono\$RunOS.$RunArch.Release\mono $RunDir\artifacts\bin\aot\sgen\ /e /y
xcopy $RunDir\artifacts\bin\microsoft.netcore.app.runtime.$RunOSId-$RunArch\Release $RunDir\artifacts\bin\aot\pack\ /e /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

# 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.IO.Tests.BinaryWriterExtendedTests*' --bdn-artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --bdn-arguments="--anyCategories Libraries Runtime  --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir\artifacts\bin\aot\sgen\mini\mono-sgen.exe --customruntimepack $RunDir\artifacts\bin\aot\pack --aotcompilermode llvm --logBuildOutput --generateBinLog"

# 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.IO.Tests.BinaryWriterExtendedTests* --anyCategories Libraries Runtime " --category-exclusion-filter NoAOT NoWASM --runtimes monoaotllvm --aotcompilerpath $RunDir\artifacts\bin\aot\sgen\mini\mono-sgen.exe --customruntimepack $RunDir\artifacts\bin\aot\pack -aotcompilermode llvm --logBuildOutput --generateBinLog " --artifacts $RunDir\artifacts\BenchmarkDotNet.Artifacts --packages $RunDir\performance\artifacts\packages --buildTimeout 1200
```

</details>

<details>


### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-1417272a-7d1b-47f5-bfa0-bd3ca867432a503194497ed40309d/ebb5752f-2948-4dcb-85a3-6159ceb2167c.zip?sv=2021-08-06&se=2023-05-28T05%3A35%3A38Z&sr=c&sp=rl&sig=y8FZZqXsISDlsb3wmfa1Cox0kz4%2FDfh2EEDSoY61saE%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2b9e615d-78da-4ada-b017-eb38d0d7f46de9c051845844be898/ad0f1b83-ee02-4823-abba-6f4b6bd9b72a.zip?sv=2021-08-06&se=2023-05-29T01%3A32%3A44Z&sr=c&sp=rl&sig=mcXiug5c6Tp2Wmn1szeThXhEeyYP9i082lmumi8kNg8%3D>)
### Histogram

#### System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars: 2000000)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 4.002280017708333 < 5.155423950138889.
IsChangePoint: Marked as a change because one of 1/5/2023 4:05:11 PM, 4/12/2023 6:21:10 AM, 4/17/2023 5:51:51 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 16.052410912209506 (T) = (0 -3966539.9361363635) / Math.Sqrt((518696192758.4102 / (299)) + (7695682103.345787 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.1664404933455168 = (4758556.413154226 - 3966539.9361363635) / 4758556.413154226 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiString(StringLengthInChars: 8000)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 14.209807684178744 < 18.820871694384792.
IsChangePoint: Marked as a change because one of 1/5/2023 4:05:11 PM, 4/12/2023 6:21:10 AM, 4/17/2023 5:51:51 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 24.967826869639488 (T) = (0 -14408.138873037835) / Math.Sqrt((6843599.189599262 / (299)) + (30240.90399100656 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.2172005450182379 = (18405.91326596353 - 14408.138873037835) / 18405.91326596353 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### JIT Disasms

#### System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars: 8000)

```log

```
### Description of detection logic
```
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed: Marked as improvement because 14.547142639931208 < 18.903306558009778.
IsChangePoint: Marked as a change because one of 1/5/2023 4:05:11 PM, 4/12/2023 6:21:10 AM, 4/17/2023 5:51:51 AM, 4/28/2023 1:33:49 PM, 5/2/2023 12:51:17 PM falls between 4/23/2023 8:38:14 PM and 5/2/2023 12:51:17 PM.
IsImprovementStdDev: Marked as improvement because 27.27369675930641 (T) = (0 -14604.856836707737) / Math.Sqrt((5283441.7565725045 / (299)) + (11022.732675098126 / (11))) is greater than 1.9676960046166507 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (11) - 2, .975) and 0.2033017463398939 = (18331.729446640133 - 14604.856836707737) / 18331.729446640133 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```
### 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 20.04
Queue	AmpereUbuntu
Baseline	375cc6d80d3620415309c35d4dbcfc2172f50fab
Compare	231f85f754110bea22930effcbd348babec32423
Diff	Diff
Configs	CompilationMode:tiered, LLVM:false, MonoAOT:true, MonoInterpreter:false, RunKind:micro_mono

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
LastIndexOfAnyValues - Duration of single invocation	319.73 ns	229.89 ns	0.72	0.01	False
IndexOfAnyThreeValues - Duration of single invocation	377.22 ns	245.79 ns	0.65	0.01	False
IndexOfAnyThreeValues - Duration of single invocation	172.06 ns	36.95 ns	0.21	0.10	False
IndexOfAnyFourValues - Duration of single invocation	200.14 ns	46.39 ns	0.23	0.03	False
IndexOfAnyFourValues - Duration of single invocation	413.12 ns	265.26 ns	0.64	0.02	False
IndexOfAnyFiveValues - Duration of single invocation	244.86 ns	49.61 ns	0.20	0.03	False
IndexOfAnyTwoValues - Duration of single invocation	325.26 ns	231.56 ns	0.71	0.01	True
IndexOfAnyFiveValues - Duration of single invocation	469.29 ns	275.80 ns	0.59	0.01	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
IsSuffix_DifferentLastChar - Duration of single invocation	3.41 μs	741.57 ns	0.22	0.01	False
IsPrefix_FirstHalf - Duration of single invocation	1.72 μs	373.42 ns	0.22	0.01	False
IsSuffix_SecondHalf - Duration of single invocation	1.72 μs	370.54 ns	0.22	0.01	False
IsPrefix_DifferentFirstChar - Duration of single invocation	145.38 ns	44.13 ns	0.30	0.08	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
WriteAsciiCharArray - Duration of single invocation	5.45 ms	4.00 ms	0.73	0.02	False
WriteAsciiString - Duration of single invocation	19.80 μs	14.21 μs	0.72	0.01	False
WriteAsciiCharArray - Duration of single invocation	19.95 μs	14.55 μs	0.73	0.01	False

[Perf] Linux/arm64: 32 Improvements on 4/28/2023 7:22:08 PM #17315

Description

Run Information

Improvements in System.Memory.Span<Byte>

Repro

Payloads

Prerequisites (Files either built locally (with build.(sh/cmd) or downloaded from payload above (if same system setup) (in this order))

Payloads

Histogram

System.Memory.Span<Byte>.LastIndexOfAnyValues(Size: 512)

Description of detection logic

JIT Disasms

System.Memory.Span<Byte>.IndexOfAnyThreeValues(Size: 512)

Description of detection logic

JIT Disasms

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

Description of detection logic

JIT Disasms

System.Memory.Span<Byte>.IndexOfAnyFourValues(Size: 33)

Description of detection logic

JIT Disasms

System.Memory.Span<Byte>.IndexOfAnyFourValues(Size: 512)

Description of detection logic

JIT Disasms

System.Memory.Span<Byte>.IndexOfAnyFiveValues(Size: 33)

Description of detection logic

JIT Disasms

System.Memory.Span<Byte>.IndexOfAnyTwoValues(Size: 512)

Description of detection logic

JIT Disasms

System.Memory.Span<Byte>.IndexOfAnyFiveValues(Size: 512)

Description of detection logic

JIT Disasms

Docs

Run Information

Improvements in System.Globalization.Tests.StringSearch

Repro

Payloads

Prerequisites (Files either built locally (with build.(sh/cmd) or downloaded from payload above (if same system setup) (in this order))

Payloads

Histogram

System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options: (en-US, OrdinalIgnoreCase, False))

Description of detection logic

JIT Disasms

System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options: (en-US, OrdinalIgnoreCase, False))

Description of detection logic

JIT Disasms

System.Globalization.Tests.StringSearch.IsSuffix_SecondHalf(Options: (en-US, OrdinalIgnoreCase, False))

Description of detection logic

JIT Disasms

System.Globalization.Tests.StringSearch.IsPrefix_DifferentFirstChar(Options: (en-US, OrdinalIgnoreCase, False))

Description of detection logic

JIT Disasms

Docs

Run Information

Improvements in System.IO.Tests.BinaryWriterExtendedTests

Repro

Payloads

Prerequisites (Files either built locally (with build.(sh/cmd) or downloaded from payload above (if same system setup) (in this order))

Payloads

Histogram

System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars: 2000000)

Description of detection logic

JIT Disasms

System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiString(StringLengthInChars: 8000)

Description of detection logic

JIT Disasms

System.IO.Tests.BinaryWriterExtendedTests.WriteAsciiCharArray(StringLengthInChars: 8000)

Description of detection logic

JIT Disasms

Docs

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development