[Perf] Linux/arm64: 1 Regression on 5/28/2026 1:46:30 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [50b8d1a7b7bb9c76b4332d44e7093a98ddc8228b](https://github.com/dotnet/runtime/commit/50b8d1a7b7bb9c76b4332d44e7093a98ddc8228b)
Compare | [87494fa4b24e277aa7cbb927f032ecebe4fbde21](https://github.com/dotnet/runtime/commit/87494fa4b24e277aa7cbb927f032ecebe4fbde21)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50b8d1a7b7bb9c76b4332d44e7093a98ddc8228b...87494fa4b24e277aa7cbb927f032ecebe4fbde21)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Regressions in System.Collections.DictionaryContainsKey<Int32>

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

• [ContainsKeyTrue - 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.Collections.DictionaryContainsKey*'
```

### System.Collections.DictionaryContainsKey<Int32>.ContainsKeyTrue(Size: 512)

#### 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)