[Perf] Linux/x64: 1 Regression on 7/31/2026 9:26:14 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [8c1bd18b8c65722ac42857e5bb2fe68d67f9f63d](https://github.com/dotnet/sdk/commit/8c1bd18b8c65722ac42857e5bb2fe68d67f9f63d)
Compare | [bfb5366c2c6e45c00cd194bc21c623d32fcd4066](https://github.com/dotnet/sdk/commit/bfb5366c2c6e45c00cd194bc21c623d32fcd4066)
Diff | [Diff](https://github.com/dotnet/sdk/compare/8c1bd18b8c65722ac42857e5bb2fe68d67f9f63d...bfb5366c2c6e45c00cd194bc21c623d32fcd4066)
Configs | CompilationMode:tiered, RunKind:imagesharp

### Regressions in SixLabors.ImageSharp.Benchmarks.Processing.Diffuse

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

• [DoDither - 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'SixLabors.ImageSharp.Benchmarks.Processing.Diffuse*'
```

### SixLabors.ImageSharp.Benchmarks.Processing.Diffuse.DoDither

#### 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 at src/benchmarks/real-world/ImageSharp/Processing/Diffuse.cs lines 22-29 and reproduce it with the benchmarks_ci.py command in the issue. Compare the listed baseline and test commits, then inspect the linked regression and test reports to identify the cause. Done means the DoDither regression is explained and the benchmark returns to its expected performance.

Written by the indexing model from the issue text.