dotnet / dotnet/perf-autofiling-issues

[Perf] Windows/x86: 1 Regression on 5/2/2026 9:34:13 PM +00:00

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arch-x86 branch-refs/heads/main compilationmode-tiered kind-micro os-windows perf-regression runkind-micro runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [b74595701421282895300b139f2064745c583f7d](https://github.com/dotnet/runtime/commit/b74595701421282895300b139f2064745c583f7d)
Compare | [ebcaacc31a0da8c4f36e33dbc736bae5264acb3f](https://github.com/dotnet/runtime/commit/ebcaacc31a0da8c4f36e33dbc736bae5264acb3f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b74595701421282895300b139f2064745c583f7d...ebcaacc31a0da8c4f36e33dbc736bae5264acb3f)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Collections.ContainsFalse<String>

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

  • [Queue - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 226.55 μs | 287.95 μs | 1.27 | 0.36 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.ContainsFalse*'
```

### System.Collections.ContainsFalse<String>.Queue(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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