dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/arm64: 6 Improvements on 2/25/2026 6:49:34 AM +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 | [033999592b8a93a838f43dba43ac47a6a8943a66](https://github.com/dotnet/runtime/commit/033999592b8a93a838f43dba43ac47a6a8943a66)
Compare | [4a31f31508cdff37d5cd481367baea4f4d80df99](https://github.com/dotnet/runtime/commit/4a31f31508cdff37d5cd481367baea4f4d80df99)
Diff | [Diff](https://github.com/dotnet/runtime/compare/033999592b8a93a838f43dba43ac47a6a8943a66...4a31f31508cdff37d5cd481367baea4f4d80df99)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [MatchesWords - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 4.54 μs | 3.56 μs | 0.78 | 0.29 | False | | |
|
  • [MatchWord - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 218.54 ns | 159.35 ns | 0.73 | 0.35 | False | | |
|
  • [SplitWords - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 4.05 μs | 3.04 μs | 0.75 | 0.03 | False | | |
|
  • [ReplaceWords - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.71 μs | 2.74 μs | 0.74 | 0.00 | False | | |

![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.Text.RegularExpressions.Tests.Perf_Regex_Common*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.MatchesWords(Options: Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.MatchWord(Options: Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.SplitWords(Options: Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.ReplaceWords(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 | [033999592b8a93a838f43dba43ac47a6a8943a66](https://github.com/dotnet/runtime/commit/033999592b8a93a838f43dba43ac47a6a8943a66)
Compare | [4a31f31508cdff37d5cd481367baea4f4d80df99](https://github.com/dotnet/runtime/commit/4a31f31508cdff37d5cd481367baea4f4d80df99)
Diff | [Diff](https://github.com/dotnet/runtime/compare/033999592b8a93a838f43dba43ac47a6a8943a66...4a31f31508cdff37d5cd481367baea4f4d80df99)
Configs | CompilationMode:tiered, RunKind:micro

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

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]()
| 9.88 ms | 5.13 ms | 0.52 | 0.00 | 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_Industry_Leipzig*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig.Count(Pattern: "Tom.{10,25}river|river.{10,25}Tom", 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 | [033999592b8a93a838f43dba43ac47a6a8943a66](https://github.com/dotnet/runtime/commit/033999592b8a93a838f43dba43ac47a6a8943a66)
Compare | [4a31f31508cdff37d5cd481367baea4f4d80df99](https://github.com/dotnet/runtime/commit/4a31f31508cdff37d5cd481367baea4f4d80df99)
Diff | [Diff](https://github.com/dotnet/runtime/compare/033999592b8a93a838f43dba43ac47a6a8943a66...4a31f31508cdff37d5cd481367baea4f4d80df99)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in BenchmarksGame.RegexRedux_1

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

  • [RunBench - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 47.79 ms | 31.85 ms | 0.67 | 0.12 | 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 'BenchmarksGame.RegexRedux_1*'
```

### BenchmarksGame.RegexRedux_1.RunBench

#### 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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