dotnet / dotnet/perf-autofiling-issues

[Perf] Windows/x86: 5 Improvements on 3/18/2026 9:54:12 PM +00:00

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arch-x86 branch-refs/heads/main kind-micro os-windows perf-improvement runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [593e56654f34b3f697cdcc9c0f138471c78e66fe](https://github.com/dotnet/runtime/commit/593e56654f34b3f697cdcc9c0f138471c78e66fe)
Compare | [12cdada8d6a5d342c3d0647b3c2f5b1d36c08821](https://github.com/dotnet/runtime/commit/12cdada8d6a5d342c3d0647b3c2f5b1d36c08821)
Diff | [Diff](https://github.com/dotnet/runtime/compare/593e56654f34b3f697cdcc9c0f138471c78e66fe...12cdada8d6a5d342c3d0647b3c2f5b1d36c08821)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Compression.Gzip

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

  • [CompressAsync - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 3.80 ms | 3.33 ms | 0.88 | 0.04 | False | | |
|
  • [Compress - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 3.82 ms | 3.33 ms | 0.87 | 0.01 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Compression.Gzip*'
```

### System.IO.Compression.Gzip.CompressAsync(level: Optimal, file: "TestDocument.pdf")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Compression.Gzip.Compress(level: Optimal, file: "TestDocument.pdf")

#### 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 | [593e56654f34b3f697cdcc9c0f138471c78e66fe](https://github.com/dotnet/runtime/commit/593e56654f34b3f697cdcc9c0f138471c78e66fe)
Compare | [12cdada8d6a5d342c3d0647b3c2f5b1d36c08821](https://github.com/dotnet/runtime/commit/12cdada8d6a5d342c3d0647b3c2f5b1d36c08821)
Diff | [Diff](https://github.com/dotnet/runtime/compare/593e56654f34b3f697cdcc9c0f138471c78e66fe...12cdada8d6a5d342c3d0647b3c2f5b1d36c08821)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Compression.ZLib

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

  • [Compress - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 3.74 ms | 3.32 ms | 0.89 | 0.01 | False | | |
|
  • [CompressAsync - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 3.73 ms | 3.36 ms | 0.90 | 0.01 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Compression.ZLib*'
```

### System.IO.Compression.ZLib.Compress(level: Optimal, file: "TestDocument.pdf")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Compression.ZLib.CompressAsync(level: Optimal, file: "TestDocument.pdf")

#### 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 | [593e56654f34b3f697cdcc9c0f138471c78e66fe](https://github.com/dotnet/runtime/commit/593e56654f34b3f697cdcc9c0f138471c78e66fe)
Compare | [12cdada8d6a5d342c3d0647b3c2f5b1d36c08821](https://github.com/dotnet/runtime/commit/12cdada8d6a5d342c3d0647b3c2f5b1d36c08821)
Diff | [Diff](https://github.com/dotnet/runtime/compare/593e56654f34b3f697cdcc9c0f138471c78e66fe...12cdada8d6a5d342c3d0647b3c2f5b1d36c08821)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.IO.Compression.Deflate

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

  • [CompressAsync - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 3.80 ms | 3.33 ms | 0.87 | 0.02 | 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.IO.Compression.Deflate*'
```

### System.IO.Compression.Deflate.CompressAsync(level: Optimal, file: "TestDocument.pdf")

#### 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)

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