dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/arm64: 11 Improvements on 1/21/2026 11:16:49 PM +00:00

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ampere arch-arm64 branch-refs/heads/main kind-micro os-linux perf-improvement runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [2d4ed4aee354b3b7df5131e99146d120bd0350e2](https://github.com/dotnet/runtime/commit/2d4ed4aee354b3b7df5131e99146d120bd0350e2)
Compare | [6b548dc328be4ee47b42b52a1276d6ff8031403a](https://github.com/dotnet/runtime/commit/6b548dc328be4ee47b42b52a1276d6ff8031403a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2d4ed4aee354b3b7df5131e99146d120bd0350e2...6b548dc328be4ee47b42b52a1276d6ff8031403a)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Guid

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [ctor_bytes - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.87 ns | 0.85 ns | 0.29 | 0.29 | False | | |
|
  • [ctor_str - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 30.00 ns | 25.43 ns | 0.85 | 0.01 | False | | |
|
  • [TryWriteBytes - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.44 ns | 0.00 ns | 0.00 | 0.74 | False | | |
|
  • [Parse - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 30.13 ns | 25.38 ns | 0.84 | 0.01 | False | | |
|
  • [ParseExactD - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 29.21 ns | 25.37 ns | 0.87 | 0.01 | False | | |

![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
[Test Report]()

### 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.Tests.Perf_Guid*'
```

### System.Tests.Perf_Guid.ctor_bytes

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.ctor_str

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.TryWriteBytes

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.Parse

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Guid.ParseExactD

#### 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)

---

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [2d4ed4aee354b3b7df5131e99146d120bd0350e2](https://github.com/dotnet/runtime/commit/2d4ed4aee354b3b7df5131e99146d120bd0350e2)
Compare | [614b68725fd6d4678494c775eafea09bda82356f](https://github.com/dotnet/runtime/commit/614b68725fd6d4678494c775eafea09bda82356f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2d4ed4aee354b3b7df5131e99146d120bd0350e2...614b68725fd6d4678494c775eafea09bda82356f)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Buffers.Binary.Tests.BinaryReadAndWriteTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [ReadStructAndReverseLE - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.64 ns | 0.60 ns | 0.36 | 0.48 | False | | |

![graph]()
[Test Report]()

### 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*'
```

### System.Buffers.Binary.Tests.BinaryReadAndWriteTests.ReadStructAndReverseLE

#### 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)

---

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [2d4ed4aee354b3b7df5131e99146d120bd0350e2](https://github.com/dotnet/runtime/commit/2d4ed4aee354b3b7df5131e99146d120bd0350e2)
Compare | [614b68725fd6d4678494c775eafea09bda82356f](https://github.com/dotnet/runtime/commit/614b68725fd6d4678494c775eafea09bda82356f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2d4ed4aee354b3b7df5131e99146d120bd0350e2...614b68725fd6d4678494c775eafea09bda82356f)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements 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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [Count - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 32.46 ms | 29.80 ms | 0.92 | 0.11 | False | | |
|
  • [Count - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 11.86 ms | 10.82 ms | 0.91 | 0.03 | False | | |
|
  • [Count - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 19.38 ms | 16.93 ms | 0.87 | 0.12 | False | | |

![graph]()
![graph]()
![graph]()
[Test Report]()

### 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*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "\\p{Ll}", Options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "\\w+", Options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_RustLang_Sherlock.Count(Pattern: "\\p{L}", Options: Compiled)

#### 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)

---

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [2d4ed4aee354b3b7df5131e99146d120bd0350e2](https://github.com/dotnet/runtime/commit/2d4ed4aee354b3b7df5131e99146d120bd0350e2)
Compare | [6b548dc328be4ee47b42b52a1276d6ff8031403a](https://github.com/dotnet/runtime/commit/6b548dc328be4ee47b42b52a1276d6ff8031403a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2d4ed4aee354b3b7df5131e99146d120bd0350e2...6b548dc328be4ee47b42b52a1276d6ff8031403a)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Tests.Perf_File

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [Delete - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 17.71 μs | 12.56 μs | 0.71 | 0.72 | False | | |

![graph]()
[Test Report]()

### 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.Tests.Perf_File*'
```

### System.IO.Tests.Perf_File.Delete

#### 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)

---

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [2d4ed4aee354b3b7df5131e99146d120bd0350e2](https://github.com/dotnet/runtime/commit/2d4ed4aee354b3b7df5131e99146d120bd0350e2)
Compare | [6b548dc328be4ee47b42b52a1276d6ff8031403a](https://github.com/dotnet/runtime/commit/6b548dc328be4ee47b42b52a1276d6ff8031403a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2d4ed4aee354b3b7df5131e99146d120bd0350e2...6b548dc328be4ee47b42b52a1276d6ff8031403a)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.RegularExpressions.Tests.Perf_Regex_Common

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [Ctor - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 72.91 μs | 33.81 μs | 0.46 | 0.63 | False | | |

![graph]()
[Test Report]()

### 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_Common*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.Ctor(Options: IgnoreCase, Compiled)

#### 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)

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