dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 7 Improvements on 4/23/2026 10:32:19 AM +00:00

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arch-x64 branch-refs/heads/main compilationmode-tiered kind-micro os-linux perf-improvement runkind-micro runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [6f2ad2d6d76430b0f7c5bddabb64d9957092453a](https://github.com/dotnet/runtime/commit/6f2ad2d6d76430b0f7c5bddabb64d9957092453a)
Compare | [ad1912bde052d02d1fb75633a23dc4a313a3b7d0](https://github.com/dotnet/runtime/commit/ad1912bde052d02d1fb75633a23dc4a313a3b7d0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/6f2ad2d6d76430b0f7c5bddabb64d9957092453a...ad1912bde052d02d1fb75633a23dc4a313a3b7d0)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Int128

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

  • [TryFormat - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 68.75 ns | 41.15 ns | 0.60 | 0.10 | False | | |
|
  • [TryFormat - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 67.23 ns | 40.40 ns | 0.60 | 0.03 | False | | |
|
  • [ToString - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 70.88 ns | 42.79 ns | 0.60 | 0.05 | False | | |
|
  • [ToString - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 80.42 ns | 52.02 ns | 0.65 | 0.02 | 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.Tests.Perf_Int128*'
```

### System.Tests.Perf_Int128.TryFormat(value: -170141183460469231731687303715884105728)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Int128.TryFormat(value: 170141183460469231731687303715884105727)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Int128.ToString(value: 170141183460469231731687303715884105727)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Int128.ToString(value: -170141183460469231731687303715884105728)

#### 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 | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [6f2ad2d6d76430b0f7c5bddabb64d9957092453a](https://github.com/dotnet/runtime/commit/6f2ad2d6d76430b0f7c5bddabb64d9957092453a)
Compare | [ad1912bde052d02d1fb75633a23dc4a313a3b7d0](https://github.com/dotnet/runtime/commit/ad1912bde052d02d1fb75633a23dc4a313a3b7d0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/6f2ad2d6d76430b0f7c5bddabb64d9957092453a...ad1912bde052d02d1fb75633a23dc4a313a3b7d0)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Random

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

  • [NextBytes_unseeded - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 120.88 ns | 106.55 ns | 0.88 | 0.00 | False | | |
|
  • [NextBytes_span_unseeded - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 121.39 ns | 108.04 ns | 0.89 | 0.01 | False | | |

![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_Random*'
```

### System.Tests.Perf_Random.NextBytes_unseeded

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Random.NextBytes_span_unseeded

#### 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 | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [6f2ad2d6d76430b0f7c5bddabb64d9957092453a](https://github.com/dotnet/runtime/commit/6f2ad2d6d76430b0f7c5bddabb64d9957092453a)
Compare | [ad1912bde052d02d1fb75633a23dc4a313a3b7d0](https://github.com/dotnet/runtime/commit/ad1912bde052d02d1fb75633a23dc4a313a3b7d0)
Diff | [Diff](https://github.com/dotnet/runtime/compare/6f2ad2d6d76430b0f7c5bddabb64d9957092453a...ad1912bde052d02d1fb75633a23dc4a313a3b7d0)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.IterateForNonGeneric<Int32>

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

  • [ArrayList - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 357.66 ns | 286.26 ns | 0.80 | 0.33 | 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.Collections.IterateForNonGeneric*'
```

### System.Collections.IterateForNonGeneric<Int32>.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)

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