[Perf] Windows/x64: 3 Regressions on 8/20/2026 10:37:15 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99](https://github.com/dotnet/sdk/commit/7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99)
Compare | [b8c18a5c2f5d06efdd635120822953728b21678e](https://github.com/dotnet/sdk/commit/b8c18a5c2f5d06efdd635120822953728b21678e)
Diff | [Diff](https://github.com/dotnet/sdk/compare/7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99...b8c18a5c2f5d06efdd635120822953728b21678e)
Configs | CompilationMode:tiered, RunKind:scenarios

### Regressions in Startup - WinForms Large - FDD Publish

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

• [Startup - WinForms Large - FDD Publish - Generic Startup]()
• [ADX - Test Multi Config Graph]()

| 1026.46 ms | 1057.72 ms | 1.03 | 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 'Startup - WinForms Large - FDD Publish*'
```

### Startup - WinForms Large - FDD Publish

#### 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 | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99](https://github.com/dotnet/sdk/commit/7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99)
Compare | [b8c18a5c2f5d06efdd635120822953728b21678e](https://github.com/dotnet/sdk/commit/b8c18a5c2f5d06efdd635120822953728b21678e)
Diff | [Diff](https://github.com/dotnet/sdk/compare/7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99...b8c18a5c2f5d06efdd635120822953728b21678e)
Configs | CompilationMode:tiered, RunKind:scenarios

### Regressions in Startup - PaintDotNet - FDD Publish

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

• [Startup - PaintDotNet - FDD Publish - Generic Startup]()
• [ADX - Test Multi Config Graph]()

| 1048.35 ms | 1069.37 ms | 1.02 | 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 'Startup - PaintDotNet - FDD Publish*'
```

### Startup - PaintDotNet - FDD Publish

#### 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 | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99](https://github.com/dotnet/sdk/commit/7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99)
Compare | [b8c18a5c2f5d06efdd635120822953728b21678e](https://github.com/dotnet/sdk/commit/b8c18a5c2f5d06efdd635120822953728b21678e)
Diff | [Diff](https://github.com/dotnet/sdk/compare/7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99...b8c18a5c2f5d06efdd635120822953728b21678e)
Configs | CompilationMode:tiered, RunKind:scenarios

### Regressions in Startup - Static Winforms Template - FDD Publish

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

• [Startup - Static Winforms Template - FDD Publish - Generic Startup]()
• [ADX - Test Multi Config Graph]()

| 85.82 ms | 90.96 ms | 1.06 | 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 'Startup - Static Winforms Template - FDD Publish*'
```

### Startup - Static Winforms Template - FDD Publish

#### 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 scripts/benchmarks_ci.py and the documented benchmarking workflow, then run the three supplied filters on Windows x64 and inspect the linked reports and baseline/compare commits. Done means the cause of each reported startup regression is established and a rerun confirms the regressions are resolved.

Written by the indexing model from the issue text.