[Perf] Windows/x86: 10 Regressions on 4/26/2026 8:44:15 AM +00:00

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#71,912 opened on Apr 26, 2026 1 comment 0 reactions 0 assignees View on GitHub

arch-x86 branch-11.0 compilationmode-tiered kind-sdk_scenarios 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 | [ab01524bbb2ef1eea0ffaef161b3ef5686e8f256](https://github.com/dotnet/sdk/commit/ab01524bbb2ef1eea0ffaef161b3ef5686e8f256)
Compare | [472c68a4fb23be92717d1714fb7a38bda7c4aac0](https://github.com/dotnet/sdk/commit/472c68a4fb23be92717d1714fb7a38bda7c4aac0)
Diff | [Diff](https://github.com/dotnet/sdk/compare/ab01524bbb2ef1eea0ffaef161b3ef5686e8f256...472c68a4fb23be92717d1714fb7a38bda7c4aac0)
Configs | CompilationMode:tiered, RunKind:sdk_scenarios

### Regressions in SDK NUnit 3 Test Project Template Clean Build

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

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

| 2694.67 ms | 2758.41 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 NUnit 3 Test Project Template Clean Build*'
```

### SDK NUnit 3 Test Project Template Clean Build

#### 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

### Improvements in Inner Loop Blazor Client

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

[Inner Loop Blazor Client - Generic Startup Diff]()
[ADX - Test Multi Config Graph]()

| 1973.28 ms | 1519.92 ms | 0.77 | 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 'Inner Loop Blazor Client*'
```

### Inner Loop Blazor Client

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in Inner Loop MVC

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

[Inner Loop MVC - Generic Startup Diff]()
[ADX - Test Multi Config Graph]()

| 421.89 ms | 406.47 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 'Inner Loop MVC*'
```

### Inner Loop MVC

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Console Template net8.0 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]()

| 2763.29 ms | 2827.90 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 net8.0 Clean Build*'
```

### SDK Console Template net8.0 Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK Class library Template Clean Build

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

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

| 2281.05 ms | 2329.42 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 Class library Template Clean Build*'
```

### SDK Class library Template Clean Build

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions in SDK New Console

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

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

| 1059.19 ms | 1143.27 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 New Console*'
```

### SDK New Console

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Regressions 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]()

| 1396.86 ms | 1461.08 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 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 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]()

| 941.20 ms | 990.13 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 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]()

| 3496.53 ms | 3606.30 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 Razor Class Library Template Clean Build*'
```

### SDK Razor Class Library Template Clean Build

#### 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]()

| 3753.22 ms | 3856.60 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 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

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with the linked performance reports, baseline and compare commits, then run scripts/benchmarks_ci.py using the provided filter on Windows x86. Review the benchmarking workflow documentation and compare the reported scenarios against the baseline; done means the regressions have a documented cause and a recorded fix or disposition.

Written by the indexing model from the issue text.

Assessment

Tech stack: git, python
Domain: performance, testing
Issue type: Bug
Difficulty: 4/5
Estimated time: 3-5 days
Activity status: Quiet
Clarity: Needs clarification
Newbie friendliness: 25/100

[Perf] Windows/x86: 10 Regressions on 4/26/2026 8:44:15 AM +00:00

Description

Contributor guide

Research direction

Assessment

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