[Perf] Linux/x64: 2 Improvements on 9/6/2026 6:55:28 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [5b11923ecac20a8367b4ca60a9b9739479319e9a](https://github.com/dotnet/runtime/commit/5b11923ecac20a8367b4ca60a9b9739479319e9a)
Compare | [570fcdab16c5b674bb59007f4faa705671d69cc2](https://github.com/dotnet/runtime/commit/570fcdab16c5b674bb59007f4faa705671d69cc2)
Diff | [Diff](https://github.com/dotnet/runtime/compare/5b11923ecac20a8367b4ca60a9b9739479319e9a...570fcdab16c5b674bb59007f4faa705671d69cc2)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Improvements in BenchmarksGame.PiDigits_3

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

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

| 426.76 ms | 377.42 ms | 0.88 | 0.00 | 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 'BenchmarksGame.PiDigits_3*'
```

### BenchmarksGame.PiDigits_3.RunBench(n: 3000, expected: "8649423196\t:3000")

#### 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)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [5b11923ecac20a8367b4ca60a9b9739479319e9a](https://github.com/dotnet/runtime/commit/5b11923ecac20a8367b4ca60a9b9739479319e9a)
Compare | [570fcdab16c5b674bb59007f4faa705671d69cc2](https://github.com/dotnet/runtime/commit/570fcdab16c5b674bb59007f4faa705671d69cc2)
Diff | [Diff](https://github.com/dotnet/runtime/compare/5b11923ecac20a8367b4ca60a9b9739479319e9a...570fcdab16c5b674bb59007f4faa705671d69cc2)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

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

| 280.28 ns | 182.86 ns | 0.65 | 0.15 | 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.IterateForEach*'
```

### System.Collections.IterateForEach<String>.Span(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 sources src/benchmarks/micro/runtime/BenchmarksGame/pidigits-3.cs and src/benchmarks/micro/libraries/System.Collections/Iterate/IterateForEach.cs, then run the supplied benchmarks_ci.py filters. Compare the linked baseline and test reports for both WASM AOT benchmarks; done means the observed improvements are explained and any required follow-up is identified.

Written by the indexing model from the issue text.