[Perf] Linux/x64: 6 Regressions on 3/6/2026 3:17:01 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [b9d3bb80ff804aa4578399759ad00120e78c4cfd](https://github.com/dotnet/runtime/commit/b9d3bb80ff804aa4578399759ad00120e78c4cfd)
Compare | [8b63bd26190fe970d9d0643f552a27a42cb8e9a2](https://github.com/dotnet/runtime/commit/8b63bd26190fe970d9d0643f552a27a42cb8e9a2)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b9d3bb80ff804aa4578399759ad00120e78c4cfd...8b63bd26190fe970d9d0643f552a27a42cb8e9a2)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.Reflection.Attributes

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

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

| 1.05 μs | 1.14 μs | 1.08 | 0.04 | False | | |
|

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

| 1.05 μs | 1.14 μs | 1.09 | 0.08 | False | | |
|

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

| 357.42 ns | 486.59 ns | 1.36 | 0.11 | False | | |
|

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

| 1.88 μs | 2.02 μs | 1.08 | 0.05 | False | | |
|

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

| 458.12 ns | 547.35 ns | 1.19 | 0.11 | False | | |
|

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

| 1.00 μs | 1.10 μs | 1.10 | 0.08 | False | | |

![graph]()
![graph]()
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[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.GetCustomAttributesMethodOverrideMiss

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodBaseMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodBaseMiss

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesClassMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodBaseMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodBaseMiss

#### 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)