[Perf] Linux/x64: 1 Improvement on 5/11/2026 11:47:33 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [df032fb61a567910e373066ea8de1cdbbe393337](https://github.com/dotnet/runtime/commit/df032fb61a567910e373066ea8de1cdbbe393337)
Compare | [4bdd9f8488636fae5084626fcaf74d827599d6f1](https://github.com/dotnet/runtime/commit/4bdd9f8488636fae5084626fcaf74d827599d6f1)
Diff | [Diff](https://github.com/dotnet/runtime/compare/df032fb61a567910e373066ea8de1cdbbe393337...4bdd9f8488636fae5084626fcaf74d827599d6f1)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Improvements in System.Collections.ContainsFalse<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]()

![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.ContainsFalse*'
```

### System.Collections.ContainsFalse<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)

Start with the benchmark source in the dotnet/performance repository, ContainsFalse.cs lines 195-204, and follow docs/benchmarking-workflow-dotnet-runtime.md. Run the provided benchmark for System.Collections.ContainsFalse under the WASM AOT configuration, then compare the linked baseline and test reports; the issue does not define a specific code change or completion criterion.

Written by the indexing model from the issue text.