[Perf] Linux/arm64: 2 Improvements on 5/29/2026 6:51:45 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [760c770a3c5427b1811a978f1252e2ed2bc9d110](https://github.com/dotnet/runtime/commit/760c770a3c5427b1811a978f1252e2ed2bc9d110)
Compare | [b2805602088588d4122d8ab39167af9bdbbfe487](https://github.com/dotnet/runtime/commit/b2805602088588d4122d8ab39167af9bdbbfe487)
Diff | [Diff](https://github.com/dotnet/runtime/compare/760c770a3c5427b1811a978f1252e2ed2bc9d110...b2805602088588d4122d8ab39167af9bdbbfe487)
Configs | CompilationMode:tiered, RunKind:micro

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

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

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

| 2.60 μs | 2.26 μs | 0.87 | 0.37 | False | | |
|

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

| 2.59 μs | 2.27 μs | 0.87 | 0.43 | False | | |

![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.IterateForEachNonGeneric*'
```

### System.Collections.IterateForEachNonGeneric<String>.ArrayList(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.IterateForEachNonGeneric<String>.Stack(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)