[Perf] Windows/x64: 1 Improvement on 4/22/2026 3:08:58 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [81b1c762c37d15a57a3b3b693447fbcd8d6df55c](https://github.com/dotnet/runtime/commit/81b1c762c37d15a57a3b3b693447fbcd8d6df55c)
Compare | [2b16e8b5ade016f59af473acca1efd5c37bbfa2c](https://github.com/dotnet/runtime/commit/2b16e8b5ade016f59af473acca1efd5c37bbfa2c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/81b1c762c37d15a57a3b3b693447fbcd8d6df55c...2b16e8b5ade016f59af473acca1efd5c37bbfa2c)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Reflection.Attributes

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

• [IsDefinedClassMiss - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Reflection.Attributes*'
```

### System.Reflection.Attributes.IsDefinedClassMiss

#### 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)