[Perf] Windows/x86: 1 Improvement on 8/22/2026 9:15:18 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [f9b6d584afa7ac1f655c5e9d991b6f9eea1052d1](https://github.com/dotnet/runtime/commit/f9b6d584afa7ac1f655c5e9d991b6f9eea1052d1)
Compare | [efc7248c8c8a7aa7ad30a58623ee5284ce462a17](https://github.com/dotnet/runtime/commit/efc7248c8c8a7aa7ad30a58623ee5284ce462a17)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f9b6d584afa7ac1f655c5e9d991b6f9eea1052d1...efc7248c8c8a7aa7ad30a58623ee5284ce462a17)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Tests.Perf_RandomAccess_NoBuffering

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

• [ReadScatterAsync - 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.Perf_RandomAccess_NoBuffering*'
```

### System.IO.Tests.Perf_RandomAccess_NoBuffering.ReadScatterAsync(fileSize: 1048576, count: 4)

#### 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 src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.RandomAccess.NoBuffering.cs, especially lines 81-98, and reproduce it with the provided benchmarks_ci.py command on Windows x86. Compare the linked test report and history for ReadScatterAsync; done means determining whether the reported improvement is valid and recording the resulting triage or investigation outcome.

Written by the indexing model from the issue text.