[Perf] Linux/x64: 1 Regression on 4/21/2026 12:07:45 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [454c7cd73dcd088bd66377b5cbe2db4cff9c7056](https://github.com/dotnet/runtime/commit/454c7cd73dcd088bd66377b5cbe2db4cff9c7056)
Compare | [81b1c762c37d15a57a3b3b693447fbcd8d6df55c](https://github.com/dotnet/runtime/commit/81b1c762c37d15a57a3b3b693447fbcd8d6df55c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/454c7cd73dcd088bd66377b5cbe2db4cff9c7056...81b1c762c37d15a57a3b3b693447fbcd8d6df55c)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.Perf_Frozen<ReferenceType>

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

• [ToFrozenDictionary - 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.Perf_Frozen*'
```

### System.Collections.Perf_Frozen<ReferenceType>.ToFrozenDictionary(Count: 4)

#### 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)