[Perf] Windows/x86: 6 Improvements on 7/13/2026 3:15:10 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [8df98c4d2d17bcba98193afa9ae2e72908921f86](https://github.com/dotnet/runtime/commit/8df98c4d2d17bcba98193afa9ae2e72908921f86)
Compare | [db330a0e1ac8c7950a07271b2a5d8ac1830243bf](https://github.com/dotnet/runtime/commit/db330a0e1ac8c7950a07271b2a5d8ac1830243bf)
Diff | [Diff](https://github.com/dotnet/runtime/compare/8df98c4d2d17bcba98193afa9ae2e72908921f86...db330a0e1ac8c7950a07271b2a5d8ac1830243bf)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Tests.Perf_File

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

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

| 162.66 μs | 103.44 μs | 0.64 | 0.76 | False | | |
|

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

| 29.69 μs | 20.59 μs | 0.69 | 0.38 | False | | |
|

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

| 30.06 μs | 21.58 μs | 0.72 | 0.34 | False | | |
|

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

| 27.93 μs | 20.55 μs | 0.74 | 0.40 | False | | |
|

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

| 132.72 μs | 109.50 μs | 0.83 | 0.61 | False | | |

![graph]()
![graph]()
![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.IO.Tests.Perf_File*'
```

### System.IO.Tests.Perf_File.WriteAllBytesAsync(size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_File.ReadAllBytesAsync(size: 4096)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_File.ReadAllBytesAsync(size: 16384)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_File.ReadAllBytesAsync(size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_File.WriteAllBytesAsync(size: 4096)

#### 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 | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [010acabe079d1bd50f838de34e9815f81d977469](https://github.com/dotnet/runtime/commit/010acabe079d1bd50f838de34e9815f81d977469)
Compare | [db330a0e1ac8c7950a07271b2a5d8ac1830243bf](https://github.com/dotnet/runtime/commit/db330a0e1ac8c7950a07271b2a5d8ac1830243bf)
Diff | [Diff](https://github.com/dotnet/runtime/compare/010acabe079d1bd50f838de34e9815f81d977469...db330a0e1ac8c7950a07271b2a5d8ac1830243bf)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Threading.Tasks.ValueTaskPerfTest

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

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

| 13711.59 ns | 77.12 ns | 0.01 | 0.61 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Threading.Tasks.ValueTaskPerfTest*'
```

### System.Threading.Tasks.ValueTaskPerfTest.CreateAndAwait_FromDelayedTCS

#### 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 sources, src/benchmarks/micro/libraries/System.IO.FileSystem/Perf.File.cs and src/benchmarks/micro/libraries/System.Threading.Tasks.Extensions/Perf.ValueTask.cs, then run the provided benchmarks_ci.py command. Compare the reported Windows/x86 results and investigate the listed improvements; the issue does not define a specific code change or completion criterion.

Written by the indexing model from the issue text.