[Perf] Linux/x64: 3 Regressions on 3/17/2026 8:26:30 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [05cc2d0fdb030057a00e580b74b75bf7f784cf4c](https://github.com/dotnet/runtime/commit/05cc2d0fdb030057a00e580b74b75bf7f784cf4c)
Compare | [fe555be1614b7b6c7a5f6f4422766044e40fb9f9](https://github.com/dotnet/runtime/commit/fe555be1614b7b6c7a5f6f4422766044e40fb9f9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/05cc2d0fdb030057a00e580b74b75bf7f784cf4c...fe555be1614b7b6c7a5f6f4422766044e40fb9f9)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in PerfLabTests.CastingPerf

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

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

| 872.33 ns | 995.04 ns | 1.14 | 0.58 | False | | |
|

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

| 540.37 ns | 755.47 ns | 1.40 | 0.24 | False | | |
|

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

| 527.01 ns | 754.02 ns | 1.43 | 0.34 | False | | |

![graph]()
![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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'PerfLabTests.CastingPerf*'
```

### PerfLabTests.CastingPerf.CheckArrayIsNonvariantGenericInterfaceNo

#### ETL Files

#### Histogram

#### JIT Disasms

### PerfLabTests.CastingPerf.CheckArrayIsVariantGenericInterfaceNo

#### ETL Files

#### Histogram

#### JIT Disasms

### PerfLabTests.CastingPerf.CheckListIsVariantGenericInterface

#### 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)