[Perf] Linux/x64: 1 Improvement on 1/21/2026 10:32:30 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | TigerUbuntu
Baseline | [0b3ba66a27a82e8a039d32a8d9aa3bd94a4f3e4c](https://github.com/dotnet/runtime/commit/0b3ba66a27a82e8a039d32a8d9aa3bd94a4f3e4c)
Compare | [2cd0cc89e2bdbcaa804c93a36adefa055d851c40](https://github.com/dotnet/runtime/commit/2cd0cc89e2bdbcaa804c93a36adefa055d851c40)
Diff | [Diff](https://github.com/dotnet/runtime/compare/0b3ba66a27a82e8a039d32a8d9aa3bd94a4f3e4c...2cd0cc89e2bdbcaa804c93a36adefa055d851c40)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.ContainsTrue<String>

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

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

| 708.20 μs | 557.67 μs | 0.79 | 0.26 | False | | |

![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.ContainsTrue*'
```

### System.Collections.ContainsTrue<String>.ImmutableList(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)