[Perf] Linux/x64: 5 Regressions on 7/24/2025 6:28:57 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | TigerUbuntu
Baseline | [3c94a470bc7fbdabafdf5d224b48dc5500e1b3b3](https://github.com/dotnet/runtime/commit/3c94a470bc7fbdabafdf5d224b48dc5500e1b3b3)
Compare | [1e860a4bd3915f35d51cc079cff212322a6991e7](https://github.com/dotnet/runtime/commit/1e860a4bd3915f35d51cc079cff212322a6991e7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3c94a470bc7fbdabafdf5d224b48dc5500e1b3b3...1e860a4bd3915f35d51cc079cff212322a6991e7)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Globalization.Tests.StringSearch

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[IsSuffix_SecondHalf - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Globalization.Tests.StringSearch.IsSuffix_SecondHalf(Options%3a%20(en-US%2c%20OrdinalIgnoreCase%2c%20False)).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Globalization/StringSearch.cs#L94-#L96>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 11.25 ns | 14.51 ns | 1.29 | 0.12 | False | | |
|<ul><li>[IsSuffix_DifferentLastChar - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options%3a%20(en-US%2c%20OrdinalIgnoreCase%2c%20False)).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Globalization/StringSearch.cs#L98-#L100>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 19.47 ns | 27.81 ns | 1.43 | 0.07 | False | | |
|<ul><li>[IsPrefix_FirstHalf - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options%3a%20(en-US%2c%20OrdinalIgnoreCase%2c%20False)).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Globalization/StringSearch.cs#L87-#L88>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 11.27 ns | 14.47 ns | 1.28 | 0.07 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Globalization.Tests.StringSearch_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Globalization.Tests.StringSearch_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Globalization.Tests.StringSearch_003.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Globalization.Tests.StringSearch.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.Globalization.Tests.StringSearch*'
```

<details>

### System.Globalization.Tests.StringSearch.IsSuffix_SecondHalf(Options: (en-US, OrdinalIgnoreCase, False))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Globalization.Tests.StringSearch.IsSuffix_DifferentLastChar(Options: (en-US, OrdinalIgnoreCase, False))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options: (en-US, OrdinalIgnoreCase, False))

#### 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 | [3c94a470bc7fbdabafdf5d224b48dc5500e1b3b3](https://github.com/dotnet/runtime/commit/3c94a470bc7fbdabafdf5d224b48dc5500e1b3b3)
Compare | [1e860a4bd3915f35d51cc079cff212322a6991e7](https://github.com/dotnet/runtime/commit/1e860a4bd3915f35d51cc079cff212322a6991e7)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3c94a470bc7fbdabafdf5d224b48dc5500e1b3b3...1e860a4bd3915f35d51cc079cff212322a6991e7)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Perf_Convert

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[FromHexString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Perf_Convert.FromHexString.html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 15.07 ns | 36.32 ns | 2.41 | 0.12 | False | | |
|<ul><li>[ToHexString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Perf_Convert.ToHexString.html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 29.80 ns | 38.94 ns | 1.31 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Perf_Convert_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Perf_Convert_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_29_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Perf_Convert.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.Perf_Convert*'
```

<details>

### System.Perf_Convert.FromHexString

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Perf_Convert.ToHexString

#### 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	3c94a470bc7fbdabafdf5d224b48dc5500e1b3b3
Compare	1e860a4bd3915f35d51cc079cff212322a6991e7
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
IsSuffix_SecondHalf - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	11.25 ns	14.51 ns	1.29	0.12	False
IsSuffix_DifferentLastChar - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	19.47 ns	27.81 ns	1.43	0.07	False
IsPrefix_FirstHalf - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	11.27 ns	14.47 ns	1.28	0.07	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
FromHexString - Duration of single invocation ADX - Test Multi Config Graph	15.07 ns	36.32 ns	2.41	0.12	False
ToHexString - Duration of single invocation ADX - Test Multi Config Graph	29.80 ns	38.94 ns	1.31	0.02	False

[Perf] Linux/x64: 5 Regressions on 7/24/2025 6:28:57 PM +00:00 #118171

Description

Run Information

Regressions in System.Globalization.Tests.StringSearch

Repro

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

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Perf_Convert

Repro

System.Perf_Convert.FromHexString

ETL Files

Histogram

JIT Disasms

System.Perf_Convert.ToHexString

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Metadata

Assignees

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