[Perf] Windows/x86: 15 Regressions on 6/5/2026 1:49:07 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [1c04596e61da849ad8f0fc008e88f000d509eee5](https://github.com/dotnet/runtime/commit/1c04596e61da849ad8f0fc008e88f000d509eee5)
Compare | [503cdd143baa519977f4e5f8cc7449fcbfc50c7b](https://github.com/dotnet/runtime/commit/503cdd143baa519977f4e5f8cc7449fcbfc50c7b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/1c04596e61da849ad8f0fc008e88f000d509eee5...503cdd143baa519977f4e5f8cc7449fcbfc50c7b)
Configs | CompilationMode:tiered, RunKind:micro

### 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]()

| 59.66 ns | 87.56 ns | 1.47 | 0.09 | False | | |
|

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

| 66.03 ns | 90.86 ns | 1.38 | 0.08 | False | | |
|

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

| 140.61 ns | 189.45 ns | 1.35 | 0.13 | False | | |
|

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

| 73.31 ns | 98.59 ns | 1.34 | 0.07 | False | | |
|

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

| 71.38 ns | 95.11 ns | 1.33 | 0.05 | False | | |
|

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

| 80.27 ns | 104.60 ns | 1.30 | 0.11 | False | | |
|

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

| 564.40 ns | 630.57 ns | 1.12 | 0.03 | False | | |
|

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

| 326.15 ns | 363.15 ns | 1.11 | 0.04 | False | | |
|

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

| 349.07 ns | 386.51 ns | 1.11 | 0.05 | False | | |
|

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

| 323.22 ns | 355.02 ns | 1.10 | 0.08 | False | | |
|

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

| 347.01 ns | 380.90 ns | 1.10 | 0.03 | False | | |
|

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

| 356.98 ns | 389.71 ns | 1.09 | 0.07 | False | | |
|

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

| 354.07 ns | 384.24 ns | 1.09 | 0.04 | False | | |
|

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

| 361.81 ns | 390.79 ns | 1.08 | 0.05 | False | | |
|

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

| 349.37 ns | 376.86 ns | 1.08 | 0.07 | False | | |

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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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Reflection.Attributes*'
```

### System.Reflection.Attributes.IsDefinedMethodBaseMiss

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodBaseMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesClassMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesClassMiss

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodBaseMiss

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.GetCustomAttributesMethodBaseMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedClassMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedClassHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodBaseHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedClassHit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodOverrideMissInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodOverrideHitInherit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodOverrideMiss

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodOverrideHit

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Reflection.Attributes.IsDefinedMethodBaseHit

#### 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)