dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 1 Regression on 4/25/2026 4:37:41 PM +00:00

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aot-true arch-wasm arch-x64 branch-refs/heads/main compilationmode-wasm kind-micro os-linux perf-regression runkind-micro untriaged wasm-aot
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [ef44ffff6a8293800613a8a29f07b349aa05e1bc](https://github.com/dotnet/runtime/commit/ef44ffff6a8293800613a8a29f07b349aa05e1bc)
Compare | [7e176920717f4805bd7c81dd91809292324da6c6](https://github.com/dotnet/runtime/commit/7e176920717f4805bd7c81dd91809292324da6c6)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ef44ffff6a8293800613a8a29f07b349aa05e1bc...7e176920717f4805bd7c81dd91809292324da6c6)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.Tests.Perf_Int128

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

  • [Parse - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.53 μs | 2.06 μs | 1.35 | 0.02 | 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.Tests.Perf_Int128*'
```

### System.Tests.Perf_Int128.Parse(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)

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Assessment

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