[Perf] Linux/x64: System.Cryptography Regressions on 5/20/2025 6:04:06 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [58c9bad814b2e3e9ee8eb58f755e08a2108e7877](https://github.com/dotnet/runtime/commit/58c9bad814b2e3e9ee8eb58f755e08a2108e7877)
Compare | [35514cad21c2af903b8178ba97d6f1037db7e245](https://github.com/dotnet/runtime/commit/35514cad21c2af903b8178ba97d6f1037db7e245)
Diff | [Diff](https://github.com/dotnet/runtime/compare/58c9bad814b2e3e9ee8eb58f755e08a2108e7877...35514cad21c2af903b8178ba97d6f1037db7e245)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in PerfLabTests.LowLevelPerf

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[EmptyStaticFunction5Arg - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/PerfLabTests.LowLevelPerf.EmptyStaticFunction5Arg.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/runtime/perflab/LowLevelPerf.cs#L52-#L68>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.27 ms | 1.52 ms | 1.19 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/PerfLabTests.LowLevelPerf_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/PerfLabTests.LowLevelPerf.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 'PerfLabTests.LowLevelPerf*'
```

<details>

### PerfLabTests.LowLevelPerf.EmptyStaticFunction5Arg

#### 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 | [58c9bad814b2e3e9ee8eb58f755e08a2108e7877](https://github.com/dotnet/runtime/commit/58c9bad814b2e3e9ee8eb58f755e08a2108e7877)
Compare | [35514cad21c2af903b8178ba97d6f1037db7e245](https://github.com/dotnet/runtime/commit/35514cad21c2af903b8178ba97d6f1037db7e245)
Diff | [Diff](https://github.com/dotnet/runtime/compare/58c9bad814b2e3e9ee8eb58f755e08a2108e7877...35514cad21c2af903b8178ba97d6f1037db7e245)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[FixedTimeEquals_256Bit_CascadingErrors - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_CascadingErrors.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Security.Cryptography.Primitives/Perf.FixedTimeEquals.cs#L49-#L50>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 91.18 ns | 108.58 ns | 1.19 | 0.07 | False | | |
|<ul><li>[FixedTimeEquals_256Bit_Equal - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_Equal.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Security.Cryptography.Primitives/Perf.FixedTimeEquals.cs#L22-#L23>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 91.15 ns | 108.51 ns | 1.19 | 0.07 | False | | |
|<ul><li>[FixedTimeEquals_256Bit_LastBitDifferent - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_LastBitDifferent.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Security.Cryptography.Primitives/Perf.FixedTimeEquals.cs#L31-#L32>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 91.25 ns | 108.50 ns | 1.19 | 0.04 | False | | |
|<ul><li>[FixedTimeEquals_256Bit_VersusZero - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_VersusZero.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Security.Cryptography.Primitives/Perf.FixedTimeEquals.cs#L67-#L68>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 91.42 ns | 108.50 ns | 1.19 | 0.05 | False | | |
|<ul><li>[FixedTimeEquals_256Bit_AllBitsDifferent - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_AllBitsDifferent.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Security.Cryptography.Primitives/Perf.FixedTimeEquals.cs#L58-#L59>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 91.66 ns | 109.29 ns | 1.19 | 0.04 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals_003.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals_004.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals_005.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.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.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals*'
```

<details>

### System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_CascadingErrors

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_Equal

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_LastBitDifferent

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_VersusZero

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_AllBitsDifferent

#### 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 | [58c9bad814b2e3e9ee8eb58f755e08a2108e7877](https://github.com/dotnet/runtime/commit/58c9bad814b2e3e9ee8eb58f755e08a2108e7877)
Compare | [35514cad21c2af903b8178ba97d6f1037db7e245](https://github.com/dotnet/runtime/commit/35514cad21c2af903b8178ba97d6f1037db7e245)
Diff | [Diff](https://github.com/dotnet/runtime/compare/58c9bad814b2e3e9ee8eb58f755e08a2108e7877...35514cad21c2af903b8178ba97d6f1037db7e245)
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>[LastIndexOf_Word_NotFound - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(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#L106-#L108>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 437.65 ns | 560.62 ns | 1.28 | 0.19 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Globalization.Tests.StringSearch_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_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.LastIndexOf_Word_NotFound(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 | ViperUbuntu
Baseline | [58c9bad814b2e3e9ee8eb58f755e08a2108e7877](https://github.com/dotnet/runtime/commit/58c9bad814b2e3e9ee8eb58f755e08a2108e7877)
Compare | [35514cad21c2af903b8178ba97d6f1037db7e245](https://github.com/dotnet/runtime/commit/35514cad21c2af903b8178ba97d6f1037db7e245)
Diff | [Diff](https://github.com/dotnet/runtime/compare/58c9bad814b2e3e9ee8eb58f755e08a2108e7877...35514cad21c2af903b8178ba97d6f1037db7e245)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.MathBenchmarks.Double

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ExpM1 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.MathBenchmarks.Double.ExpM1.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/runtime/Math/Functions/Double/ExpM1.cs#L17-#L18>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 21.70 μs | 23.06 μs | 1.06 | 0.06 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.MathBenchmarks.Double_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.MathBenchmarks.Double.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.MathBenchmarks.Double*'
```

<details>

### System.MathBenchmarks.Double.ExpM1

#### 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 | [58c9bad814b2e3e9ee8eb58f755e08a2108e7877](https://github.com/dotnet/runtime/commit/58c9bad814b2e3e9ee8eb58f755e08a2108e7877)
Compare | [35514cad21c2af903b8178ba97d6f1037db7e245](https://github.com/dotnet/runtime/commit/35514cad21c2af903b8178ba97d6f1037db7e245)
Diff | [Diff](https://github.com/dotnet/runtime/compare/58c9bad814b2e3e9ee8eb58f755e08a2108e7877...35514cad21c2af903b8178ba97d6f1037db7e245)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.IterateForNonGeneric&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ArrayList - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Collections.IterateForNonGeneric(String).ArrayList(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Iterate/IterateForNonGeneric.cs#L24-#L32>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 292.10 ns | 351.93 ns | 1.20 | 0.12 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Collections.IterateForNonGeneric%28String%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Collections.IterateForNonGeneric%28String%29.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.IterateForNonGeneric&lt;String&gt;*'
```

<details>

### System.Collections.IterateForNonGeneric&lt;String&gt;.ArrayList(Size: 512)

#### 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 | [58c9bad814b2e3e9ee8eb58f755e08a2108e7877](https://github.com/dotnet/runtime/commit/58c9bad814b2e3e9ee8eb58f755e08a2108e7877)
Compare | [35514cad21c2af903b8178ba97d6f1037db7e245](https://github.com/dotnet/runtime/commit/35514cad21c2af903b8178ba97d6f1037db7e245)
Diff | [Diff](https://github.com/dotnet/runtime/compare/58c9bad814b2e3e9ee8eb58f755e08a2108e7877...35514cad21c2af903b8178ba97d6f1037db7e245)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Buffers.Binary.Tests.BinaryReadAndWriteTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[MeasureReverseUsingNtoH - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Buffers.Binary.Tests.BinaryReadAndWriteTests.MeasureReverseUsingNtoH.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Buffers/BinaryReadAndWriteTests.cs#L197-#L209>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 410.99 ns | 546.27 ns | 1.33 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Binary.Tests.BinaryReadAndWriteTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Buffers.Binary.Tests.BinaryReadAndWriteTests.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.Buffers.Binary.Tests.BinaryReadAndWriteTests*'
```

<details>

### System.Buffers.Binary.Tests.BinaryReadAndWriteTests.MeasureReverseUsingNtoH

#### 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 | [58c9bad814b2e3e9ee8eb58f755e08a2108e7877](https://github.com/dotnet/runtime/commit/58c9bad814b2e3e9ee8eb58f755e08a2108e7877)
Compare | [35514cad21c2af903b8178ba97d6f1037db7e245](https://github.com/dotnet/runtime/commit/35514cad21c2af903b8178ba97d6f1037db7e245)
Diff | [Diff](https://github.com/dotnet/runtime/compare/58c9bad814b2e3e9ee8eb58f755e08a2108e7877...35514cad21c2af903b8178ba97d6f1037db7e245)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Linq.Tests.Perf_Enumerable

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[SelectToArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Linq.Tests.Perf_Enumerable.SelectToArray(input%3a%20Range).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L250-#L252>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 59.58 ns | 83.69 ns | 1.40 | 0.09 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Linq.Tests.Perf_Enumerable_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/05_27_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Linq.Tests.Perf_Enumerable.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.Linq.Tests.Perf_Enumerable*'
```

<details>

### System.Linq.Tests.Perf_Enumerable.SelectToArray(input: Range)

#### 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	58c9bad814b2e3e9ee8eb58f755e08a2108e7877
Compare	35514cad21c2af903b8178ba97d6f1037db7e245
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
FixedTimeEquals_256Bit_CascadingErrors - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	91.18 ns	108.58 ns	1.19	0.07	False
FixedTimeEquals_256Bit_Equal - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	91.15 ns	108.51 ns	1.19	0.07	False
FixedTimeEquals_256Bit_LastBitDifferent - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	91.25 ns	108.50 ns	1.19	0.04	False
FixedTimeEquals_256Bit_VersusZero - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	91.42 ns	108.50 ns	1.19	0.05	False
FixedTimeEquals_256Bit_AllBitsDifferent - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	91.66 ns	109.29 ns	1.19	0.04	False

[Perf] Linux/x64: System.Cryptography Regressions on 5/20/2025 6:04:06 PM +00:00 #116020

Description

Run Information

Regressions in PerfLabTests.LowLevelPerf

Repro

PerfLabTests.LowLevelPerf.EmptyStaticFunction5Arg

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals

Repro

System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_CascadingErrors

ETL Files

Histogram

JIT Disasms

System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_Equal

ETL Files

Histogram

JIT Disasms

System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_LastBitDifferent

ETL Files

Histogram

JIT Disasms

System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_VersusZero

ETL Files

Histogram

JIT Disasms

System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_AllBitsDifferent

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Globalization.Tests.StringSearch

Repro

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

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.MathBenchmarks.Double

Repro

System.MathBenchmarks.Double.ExpM1

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.IterateForNonGeneric<String>

Repro

System.Collections.IterateForNonGeneric<String>.ArrayList(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Buffers.Binary.Tests.BinaryReadAndWriteTests

Repro

System.Buffers.Binary.Tests.BinaryReadAndWriteTests.MeasureReverseUsingNtoH

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Linq.Tests.Perf_Enumerable

Repro

System.Linq.Tests.Perf_Enumerable.SelectToArray(input: Range)

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Metadata

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