dotnet / dotnet/perf-autofiling-issues

[Perf] Windows/x64: 1 Regression on 8/14/2026 9:39:26 AM +00:00

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arch-x64 branch-11.0 compilationmode-tiered kind-imagesharp Look Again os-windows perf-regression runkind-imagesharp runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [283314d5d7f2d77d1a31087ec962a4c407106445](https://github.com/dotnet/sdk/commit/283314d5d7f2d77d1a31087ec962a4c407106445)
Compare | [7cdb217445905f3342bbb0266a4497b9a014389a](https://github.com/dotnet/sdk/commit/7cdb217445905f3342bbb0266a4497b9a014389a)
Diff | [Diff](https://github.com/dotnet/sdk/compare/283314d5d7f2d77d1a31087ec962a4c407106445...7cdb217445905f3342bbb0266a4497b9a014389a)
Configs | CompilationMode:tiered, RunKind:imagesharp

### Regressions in SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg.DecodeJpeg

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

  • [JpegBaselineInterleaved444 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 8.53 ms | 14.07 ms | 1.65 | 0.00 | True | | |

![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 'SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg.DecodeJpeg*'
```

### SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg.DecodeJpeg.JpegBaselineInterleaved444

#### 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)

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with the benchmark source at src/benchmarks/real-world/ImageSharp/Codecs/Jpeg/DecodeJpeg.cs, then reproduce the SixLabors.ImageSharp.Benchmarks.Codecs.Jpeg.DecodeJpeg filter using the provided benchmarks_ci.py command. Compare the baseline and test commits and use the linked test report or profiling workflow to identify the regression; done means the JPEG benchmark no longer shows the reported slowdown.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
45/100

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