[Perf] Linux/x64: 1 Regression on 3/28/2026 5:46:01 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [a1eb7b3e52860862ffd38e139053b66f9d10d4f6](https://github.com/dotnet/runtime/commit/a1eb7b3e52860862ffd38e139053b66f9d10d4f6)
Compare | [ff21bcd829cb8ed24b3a0de8eee8800b7fe6fa3c](https://github.com/dotnet/runtime/commit/ff21bcd829cb8ed24b3a0de8eee8800b7fe6fa3c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/a1eb7b3e52860862ffd38e139053b66f9d10d4f6...ff21bcd829cb8ed24b3a0de8eee8800b7fe6fa3c)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Reflection.Attributes

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

• [IsDefinedMethodBaseMiss - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 3.54 μs | 3.82 μs | 1.08 | 0.09 | False | | |

[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.Reflection.Attributes*'
```

### System.Reflection.Attributes.IsDefinedMethodBaseMiss

#### 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)