[Perf] Windows/x64: 2 Regressions on 8/10/2026 9:19:50 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [8a6d49a3ce3bd6d5fcbac911e446b9cce5767ae4](https://github.com/dotnet/sdk/commit/8a6d49a3ce3bd6d5fcbac911e446b9cce5767ae4)
Compare | [7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99](https://github.com/dotnet/sdk/commit/7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99)
Diff | [Diff](https://github.com/dotnet/sdk/compare/8a6d49a3ce3bd6d5fcbac911e446b9cce5767ae4...7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99)
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]()

| 80.49 ms | 85.82 ms | 1.07 | 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)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [8a6d49a3ce3bd6d5fcbac911e446b9cce5767ae4](https://github.com/dotnet/sdk/commit/8a6d49a3ce3bd6d5fcbac911e446b9cce5767ae4)
Compare | [7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99](https://github.com/dotnet/sdk/commit/7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99)
Diff | [Diff](https://github.com/dotnet/sdk/compare/8a6d49a3ce3bd6d5fcbac911e446b9cce5767ae4...7fb8cef14d9ae6bd729b04638f88d00f1ba7eb99)
Configs | CompilationMode:tiered, RunKind:scenarios

### 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]()

| 35.39 ms | 39.43 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

[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 the two linked test reports and the baseline/compare commits, then reproduce each benchmark using scripts/benchmarks_ci.py with the supplied filters. Read docs/benchmarking-workflow-dotnet-runtime.md and the profiling workflow if needed. Done means identifying the cause of both Windows/x64 startup regressions and confirming the benchmark results no longer regress.

Written by the indexing model from the issue text.