[Perf] Windows/x86: 19 Regressions on 7/31/2026 9:09:40 AM +00:00

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#77,139 opened on Jul 31, 2026 1 comment 0 reactions 0 assignees View on GitHub

arch-x86 branch-11.0 compilationmode-tiered kind-sdk_scenarios Look Again os-windows perf-regression runkind-sdk_scenarios untriaged

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Stars: 10
Forks: 8
PR merge metrics: PR metrics pending

Description

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
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:sdk_scenarios

### Regressions in SDK ASP.Net Core Empty Template Build(No Change)

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

[Net Core Empty Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 484.52 ms | 503.62 ms | 1.04 | 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 'SDK ASP.Net Core Empty Template Build(No Change)*'
```

### SDK ASP.Net Core Empty Template Build(No Change)

#### 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 SDK F# Console Template Clean Build

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

[SDK F# Console Template Clean Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 2430.36 ms | 2480.56 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 'SDK F# Console Template Clean Build*'
```

### SDK F# Console Template Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK ASP.NET Core Web API Template Clean Build

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

[NET Core Web API Template Clean Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 3400.90 ms | 3568.45 ms | 1.05 | 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 'SDK ASP.NET Core Web API Template Clean Build*'
```

### SDK ASP.NET Core Web API Template Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Console Template net11.0 Clean Build

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

[0 Clean Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 2240.32 ms | 2306.28 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 'SDK Console Template net11.0 Clean Build*'
```

### SDK Console Template net11.0 Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK NUnit 3 Test Project Template Build(No Change)

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

[SDK NUnit 3 Test Project Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 458.05 ms | 494.50 ms | 1.08 | 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 'SDK NUnit 3 Test Project Template Build(No Change)*'
```

### SDK NUnit 3 Test Project Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Console Template net9.0 Clean Build

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

[0 Clean Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 2637.06 ms | 2700.26 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 'SDK Console Template net9.0 Clean Build*'
```

### SDK Console Template net9.0 Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in SDK xUnit Test Project Template Build(No Change)

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

[SDK xUnit Test Project Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 541.12 ms | 454.15 ms | 0.84 | 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 'SDK xUnit Test Project Template Build(No Change)*'
```

### SDK xUnit Test Project Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in SDK ASP.NET Core Web App Template Build(No Change)

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

[NET Core Web App Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 615.79 ms | 594.01 ms | 0.96 | 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 'SDK ASP.NET Core Web App Template Build(No Change)*'
```

### SDK ASP.NET Core Web App Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Console Template Clean Build

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

[SDK Console Template Clean Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 2254.35 ms | 2319.05 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 'SDK Console Template Clean Build*'
```

### SDK Console Template Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Class library Template Build(No Change)

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

[SDK Class library Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 400.64 ms | 422.70 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 'SDK Class library Template Build(No Change)*'
```

### SDK Class library Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Razor Class Library Template Clean Build

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

[SDK Razor Class Library Template Clean Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 3355.69 ms | 4260.98 ms | 1.27 | 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 'SDK Razor Class Library Template Clean Build*'
```

### SDK Razor Class Library Template Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Razor Class Library Template Build(No Change)

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

[SDK Razor Class Library Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 470.71 ms | 523.75 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 'SDK Razor Class Library Template Build(No Change)*'
```

### SDK Razor Class Library Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK MSTest Test Project (.NET Core) Template Build(No Change)

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

[SDK MSTest Test Project - Process Time]()
[ADX - Test Multi Config Graph]()

| 419.01 ms | 495.70 ms | 1.18 | 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 'SDK MSTest Test Project (.NET Core) Template Build(No Change)*'
```

### SDK MSTest Test Project (.NET Core) Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK ASP.NET Core Web App (Model-View-Controller) Template Clean Build

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

[NET Core Web App - Process Time]()
[ADX - Test Multi Config Graph]()

| 3658.22 ms | 3798.03 ms | 1.04 | 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 'SDK ASP.NET Core Web App (Model-View-Controller) Template Clean Build*'
```

### SDK ASP.NET Core Web App (Model-View-Controller) Template Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in SDK ASP.NET Core Web API Template Build(No Change)

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

[NET Core Web API Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 551.72 ms | 516.05 ms | 0.94 | 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 'SDK ASP.NET Core Web API Template Build(No Change)*'
```

### SDK ASP.NET Core Web API Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK F# Console Template Build(No Change)

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

[SDK F# Console Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 435.10 ms | 445.10 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 'SDK F# Console Template Build(No Change)*'
```

### SDK F# Console Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Console Template net11.0 Build(No Change)

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

[0 Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 406.24 ms | 443.00 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 'SDK Console Template net11.0 Build(No Change)*'
```

### SDK Console Template net11.0 Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK ASP.Net Core Empty Template Clean Build

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

[Net Core Empty Template Clean Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 3021.16 ms | 3090.48 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 'SDK ASP.Net Core Empty Template Clean Build*'
```

### SDK ASP.Net Core Empty Template Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Console Template Build(No Change)

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

[SDK Console Template Build - Process Time]()
[ADX - Test Multi Config Graph]()

| 402.06 ms | 426.11 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 'SDK Console Template Build(No Change)*'
```

### SDK Console Template Build(No Change)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with scripts/benchmarks_ci.py and reproduce the listed SDK ASP.NET Core, F# Console, and console template benchmarks using the provided filters. Compare the baseline and comparison SDK commits and inspect the linked performance reports to identify the source of the regressions. Done means the regression is explained and a validated result shows whether it is resolved.

Written by the indexing model from the issue text.

Assessment

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

[Perf] Windows/x86: 19 Regressions on 7/31/2026 9:09:40 AM +00:00

Description

Contributor guide

Research direction

Assessment

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