[Perf] Windows/x64: 5 Regressions on 9/7/2026 10:47:21 AM +00:00

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#79,029 opened on Sep 7, 2026 1 comment 0 reactions 0 assignees View on GitHub

arch-x64 branch-11.0 compilationmode-tiered kind-scenarios Noise os-windows perf-regression runkind-scenarios untriaged

Dominant language: No language data
Stars: 10
Forks: 8
PR merge metrics: PR metrics pending

Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [f8a811758057986566da27d06d8f03a7e5e226bf](https://github.com/dotnet/sdk/commit/f8a811758057986566da27d06d8f03a7e5e226bf)
Compare | [c9b72963eb22ce3f8eb2ad8ebedf9ecef57615da](https://github.com/dotnet/sdk/commit/c9b72963eb22ce3f8eb2ad8ebedf9ecef57615da)
Diff | [Diff](https://github.com/dotnet/sdk/compare/f8a811758057986566da27d06d8f03a7e5e226bf...c9b72963eb22ce3f8eb2ad8ebedf9ecef57615da)
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]()

| 1049.06 ms | 1070.46 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 - 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

### Regressions in Startup - PaintDotNet - FDD Publish - Affinity 85

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

[Startup - PaintDotNet - FDD Publish - Affinity 85 - Generic Startup]()
[ADX - Test Multi Config Graph]()

| 872.65 ms | 955.56 ms | 1.10 | 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 - Affinity 85*'
```

### Startup - PaintDotNet - FDD Publish - Affinity 85

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### 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]()

| 86.44 ms | 88.73 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 - Static Winforms Template - FDD Publish*'
```

### Startup - Static Winforms Template - FDD Publish

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

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

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

[Startup - Static Console Template - FDD Publish - Time To Main]()
[ADX - Test Multi Config Graph]()

| 35.05 ms | 38.98 ms | 1.11 | 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 Console Template - FDD Publish*'
```

### Startup - Static Console Template - FDD Publish

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in Startup - New VB Console Template - FDD Publish

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

[Startup - New VB Console Template - FDD Publish - Time To Main]()
[ADX - Test Multi Config Graph]()

| 36.12 ms | 39.41 ms | 1.09 | 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 - New VB Console Template - FDD Publish*'
```

### Startup - New VB Console Template - FDD Publish

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with docs/benchmarking-workflow-dotnet-runtime.md and scripts/benchmarks_ci.py in the dotnet/performance repository, then run the supplied Windows benchmark filters. Compare the baseline and test commits and inspect the linked reports for each startup regression. Done means confirming the regressions and identifying an actionable cause or follow-up for the affected benchmarks.

Written by the indexing model from the issue text.

Assessment

Tech stack: git, python
Domain: performance
Issue type: Bug
Difficulty: 4/5
Estimated time: 3-5 days
Activity status: Active
Clarity: Needs clarification
Newbie friendliness: 35/100

[Perf] Windows/x64: 5 Regressions on 9/7/2026 10:47:21 AM +00:00

Description

Contributor guide

Research direction

Assessment

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