[Perf] Windows/x86: 2 Improvements on 7/28/2026 8:32:51 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [4d07108c0125e4741bda596f27740118c0fe3833](https://github.com/dotnet/runtime/commit/4d07108c0125e4741bda596f27740118c0fe3833)
Compare | [00fc09ea5b2e39c46d56fda130b6693e07d449d8](https://github.com/dotnet/runtime/commit/00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4d07108c0125e4741bda596f27740118c0fe3833...00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in Microsoft.Extensions.Logging.EventSourceLogger

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

• [NestedScopes_TwoMessages - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 2.24 μs | 1.95 μs | 0.87 | 0.02 | False | | |
|

• [NestedScopes_TwoMessages - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 2.13 μs | 1.95 μs | 0.91 | 0.02 | False | | |

![graph]()
![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 'Microsoft.Extensions.Logging.EventSourceLogger*'
```

### Microsoft.Extensions.Logging.EventSourceLogger.NestedScopes_TwoMessages(HasSubscribers: True, Json: False)

#### ETL Files

#### Histogram

#### JIT Disasms

### Microsoft.Extensions.Logging.EventSourceLogger.NestedScopes_TwoMessages(HasSubscribers: True, Json: True)

#### 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 Microsoft.Extensions.Logging.EventSourceLogger benchmark source at src/benchmarks/micro/libraries/Microsoft.Extensions.Logging/EventSourceBenchmark.cs#L27-L39 and the reported baseline/compare commits. Run the provided benchmarks_ci.py command, then use the linked test report and profiling workflow documentation to investigate the x86 Windows result. Done means the reported performance issue is addressed and the benchmark result is validated.

Written by the indexing model from the issue text.