dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 1 Regression on 9/12/2026 4:57:26 AM +00:00

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

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [778255f65487a100a7e7377cbf3b8cf084ec837b](https://github.com/dotnet/runtime/commit/778255f65487a100a7e7377cbf3b8cf084ec837b)
Compare | [37dd42ce9e0c75eef3da1c6477c2e7802e79d1bb](https://github.com/dotnet/runtime/commit/37dd42ce9e0c75eef3da1c6477c2e7802e79d1bb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/778255f65487a100a7e7377cbf3b8cf084ec837b...37dd42ce9e0c75eef3da1c6477c2e7802e79d1bb)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in IfStatements.IfStatements

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

  • [AndOr - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 33.76 μs | 39.15 μs | 1.16 | 0.14 | 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 'IfStatements.IfStatements*'
```

### IfStatements.IfStatements.AndOr

#### 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)

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with src/benchmarks/micro/runtime/Statements/If.cs, especially lines 135-140, and compare the listed baseline and test commits. Run the provided benchmarks_ci.py command with the IfStatements.IfStatements* filter, then use the linked report and profiling documentation to investigate the AndOr regression. Done means the regression's cause is identified and the benchmark result is validated.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, python
Domain
performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
35/100

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