[Perf] Linux/x64: 1 Improvement on 7/30/2026 6:50:50 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [72dac24a0e6fa1047002858a762f36c88e53850b](https://github.com/dotnet/runtime/commit/72dac24a0e6fa1047002858a762f36c88e53850b)
Compare | [640b326fc81d94d410753b67c0f89b166d6666df](https://github.com/dotnet/runtime/commit/640b326fc81d94d410753b67c0f89b166d6666df)
Diff | [Diff](https://github.com/dotnet/runtime/compare/72dac24a0e6fa1047002858a762f36c88e53850b...640b326fc81d94d410753b67c0f89b166d6666df)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

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

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

• [ConcurrentStack - 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.IterateForEach*'
```

### System.Collections.IterateForEach<String>.ConcurrentStack(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 linked benchmark source at src/benchmarks/micro/libraries/System.Collections/Iterate/IterateForEach.cs#L250-L258 and reproduce it using scripts/benchmarks_ci.py with the provided filter. Review the benchmark and test reports for System.Collections.IterateForEach.ConcurrentStack(Size: 512), then determine whether the reported improvement is reproducible and what follow-up is warranted.

Written by the indexing model from the issue text.