[Perf] Windows/x86: 4 Regressions on 8/20/2026 10:35:50 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [19bc97f3dd3ab67c7810e4ab179125b7c6a60641](https://github.com/dotnet/sdk/commit/19bc97f3dd3ab67c7810e4ab179125b7c6a60641)
Compare | [b8c18a5c2f5d06efdd635120822953728b21678e](https://github.com/dotnet/sdk/commit/b8c18a5c2f5d06efdd635120822953728b21678e)
Diff | [Diff](https://github.com/dotnet/sdk/compare/19bc97f3dd3ab67c7810e4ab179125b7c6a60641...b8c18a5c2f5d06efdd635120822953728b21678e)
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]()

| 2570.20 ms | 2684.72 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 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

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [19bc97f3dd3ab67c7810e4ab179125b7c6a60641](https://github.com/dotnet/sdk/commit/19bc97f3dd3ab67c7810e4ab179125b7c6a60641)
Compare | [b8c18a5c2f5d06efdd635120822953728b21678e](https://github.com/dotnet/sdk/commit/b8c18a5c2f5d06efdd635120822953728b21678e)
Diff | [Diff](https://github.com/dotnet/sdk/compare/19bc97f3dd3ab67c7810e4ab179125b7c6a60641...b8c18a5c2f5d06efdd635120822953728b21678e)
Configs | CompilationMode:tiered, RunKind:sdk_scenarios

### Improvements in Inner Loop MsBuild Console

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

• [Inner Loop MsBuild Console - Generic Startup Diff]()
• [ADX - Test Multi Config Graph]()

| 1116.58 ms | 751.26 ms | 0.67 | 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 MsBuild Console*'
```

### Inner Loop MsBuild Console

#### 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 | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [19bc97f3dd3ab67c7810e4ab179125b7c6a60641](https://github.com/dotnet/sdk/commit/19bc97f3dd3ab67c7810e4ab179125b7c6a60641)
Compare | [b8c18a5c2f5d06efdd635120822953728b21678e](https://github.com/dotnet/sdk/commit/b8c18a5c2f5d06efdd635120822953728b21678e)
Diff | [Diff](https://github.com/dotnet/sdk/compare/19bc97f3dd3ab67c7810e4ab179125b7c6a60641...b8c18a5c2f5d06efdd635120822953728b21678e)
Configs | CompilationMode:tiered, RunKind:sdk_scenarios

### Regressions in Inner Loop Console

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

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

| 723.07 ms | 765.71 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 'Inner Loop Console*'
```

### Inner Loop Console

#### 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 | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [19bc97f3dd3ab67c7810e4ab179125b7c6a60641](https://github.com/dotnet/sdk/commit/19bc97f3dd3ab67c7810e4ab179125b7c6a60641)
Compare | [b8c18a5c2f5d06efdd635120822953728b21678e](https://github.com/dotnet/sdk/commit/b8c18a5c2f5d06efdd635120822953728b21678e)
Diff | [Diff](https://github.com/dotnet/sdk/compare/19bc97f3dd3ab67c7810e4ab179125b7c6a60641...b8c18a5c2f5d06efdd635120822953728b21678e)
Configs | CompilationMode:tiered, RunKind:sdk_scenarios

### 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]()

| 427.09 ms | 802.32 ms | 1.88 | 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

[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 performance/scripts/benchmarks_ci.py and the linked benchmarking workflow. Run the supplied filters on Windows x86, then compare the baseline commit 19bc97f3dd3ab67c7810e4ab179125b7c6a60641 with b8c18a5c2f5d06efdd635120822953728b21678e for the listed SDK scenarios. Done means the reported regressions are reproduced and their cause or disposition is documented.

Written by the indexing model from the issue text.