[Perf] Linux/x64: 4 Regressions on 5/28/2025 2:43:13 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | TigerUbuntu
Baseline | [2a47838c6d353b783ca8466e40d7db756f2d2acf](https://github.com/dotnet/runtime/commit/2a47838c6d353b783ca8466e40d7db756f2d2acf)
Compare | [ffcd1c5442a0c6e5317efa46d6ce381003397476](https://github.com/dotnet/runtime/commit/ffcd1c5442a0c6e5317efa46d6ce381003397476)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2a47838c6d353b783ca8466e40d7db756f2d2acf...ffcd1c5442a0c6e5317efa46d6ce381003397476)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Compression.Deflate

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Compress - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.IO.Compression.Deflate.Compress(level%3a%20Optimal%2c%20file%3a%20%22TestDocument.pdf%22).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.82 ms | 2.05 ms | 1.13 | 0.11 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_03_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.IO.Compression.Deflate_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_03_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.IO.Compression.Deflate.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Compression.Deflate*'
```

<details>

### System.IO.Compression.Deflate.Compress(level: Optimal, file: "TestDocument.pdf")

#### 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 | [2a47838c6d353b783ca8466e40d7db756f2d2acf](https://github.com/dotnet/runtime/commit/2a47838c6d353b783ca8466e40d7db756f2d2acf)
Compare | [ffcd1c5442a0c6e5317efa46d6ce381003397476](https://github.com/dotnet/runtime/commit/ffcd1c5442a0c6e5317efa46d6ce381003397476)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2a47838c6d353b783ca8466e40d7db756f2d2acf...ffcd1c5442a0c6e5317efa46d6ce381003397476)
Configs | CompilationMode:tiered, RunKind:micro


### 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/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern%3a%20%22%5c%5cw%2b%5c%5cs%2bHolmes%5c%5cs%2b%5c%5cw%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> | 2.06 ms | 2.50 ms | 1.21 | 0.54 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_03_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_03_2025/refs/heads/main_x64_ubuntu%2022.04_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

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock*'
```

<details>

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "\\w+\\s+Holmes\\s+\\w+", 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>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | TigerUbuntu
Baseline | [2a47838c6d353b783ca8466e40d7db756f2d2acf](https://github.com/dotnet/runtime/commit/2a47838c6d353b783ca8466e40d7db756f2d2acf)
Compare | [ffcd1c5442a0c6e5317efa46d6ce381003397476](https://github.com/dotnet/runtime/commit/ffcd1c5442a0c6e5317efa46d6ce381003397476)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2a47838c6d353b783ca8466e40d7db756f2d2acf...ffcd1c5442a0c6e5317efa46d6ce381003397476)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Memory.ReadOnlySpan

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[IndexOfString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Memory.ReadOnlySpan.IndexOfString(input%3a%20%22AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAXAAAAAAAAAAAAAAAAAAAAAAAAAAAAA%22%2c%20value%3a%20%22x%22%2c%20comparisonType%3a%20InvariantCultureIgno.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/ReadOnlySpan.cs#L45-#L65>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 141.50 ns | 242.48 ns | 1.71 | 0.33 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_03_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Memory.ReadOnlySpan_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_03_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Memory.ReadOnlySpan.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.ReadOnlySpan*'
```

<details>

### System.Memory.ReadOnlySpan.IndexOfString(input: "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAXAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", value: "x", comparisonType: InvariantCultureIgnoreCase)

#### 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 | [2a47838c6d353b783ca8466e40d7db756f2d2acf](https://github.com/dotnet/runtime/commit/2a47838c6d353b783ca8466e40d7db756f2d2acf)
Compare | [ffcd1c5442a0c6e5317efa46d6ce381003397476](https://github.com/dotnet/runtime/commit/ffcd1c5442a0c6e5317efa46d6ce381003397476)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2a47838c6d353b783ca8466e40d7db756f2d2acf...ffcd1c5442a0c6e5317efa46d6ce381003397476)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Compression.Gzip

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Compress - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.IO.Compression.Gzip.Compress(level%3a%20Optimal%2c%20file%3a%20%22TestDocument.pdf%22).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.91 ms | 2.06 ms | 1.08 | 0.09 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_03_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.IO.Compression.Gzip_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_03_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.IO.Compression.Gzip.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Compression.Gzip*'
```

<details>

### System.IO.Compression.Gzip.Compress(level: Optimal, file: "TestDocument.pdf")

#### 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	2a47838c6d353b783ca8466e40d7db756f2d2acf
Compare	ffcd1c5442a0c6e5317efa46d6ce381003397476
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

[Perf] Linux/x64: 4 Regressions on 5/28/2025 2:43:13 PM +00:00 #116270

Description

Run Information

Regressions in System.IO.Compression.Deflate

Repro

System.IO.Compression.Deflate.Compress(level: Optimal, file: "TestDocument.pdf")

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock

Repro

System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "\w+\s+Holmes\s+\w+", Options: NonBacktracking)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Memory.ReadOnlySpan

Repro

System.Memory.ReadOnlySpan.IndexOfString(input: "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAXAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", value: "x", comparisonType: InvariantCultureIgnoreCase)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.IO.Compression.Gzip

Repro

System.IO.Compression.Gzip.Compress(level: Optimal, file: "TestDocument.pdf")

ETL Files

Histogram

JIT Disasms

Docs

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