[Perf] Windows/x86: 3 Regressions on 5/13/2026 9:38:20 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [edcc3af021a650c3a9b0929946f1b608ce92ba42](https://github.com/dotnet/runtime/commit/edcc3af021a650c3a9b0929946f1b608ce92ba42)
Compare | [863e48f6a3667cda03ac5dbfa55e85845d08d1cf](https://github.com/dotnet/runtime/commit/863e48f6a3667cda03ac5dbfa55e85845d08d1cf)
Diff | [Diff](https://github.com/dotnet/runtime/compare/edcc3af021a650c3a9b0929946f1b608ce92ba42...863e48f6a3667cda03ac5dbfa55e85845d08d1cf)
Configs | CompilationMode:tiered, RunKind:micro

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

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

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

| 1.40 μs | 1.58 μs | 1.13 | 0.16 | False | | |
|

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

| 1.98 μs | 2.12 μs | 1.07 | 0.15 | False | | |
|

• [OrderedDictionary - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 1.98 μs | 2.12 μs | 1.07 | 0.35 | False | | |

![graph]()
![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.IterateForEach*'
```

### System.Collections.IterateForEach<String>.HashSet(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.IterateForEach<String>.Dictionary(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.IterateForEach<String>.OrderedDictionary(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)