[Perf] Windows/x86: 1 Regression on 6/1/2026 8:05:47 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [f2d5042ceaea5642bac6bde8a1a5765afcbf2ef4](https://github.com/dotnet/runtime/commit/f2d5042ceaea5642bac6bde8a1a5765afcbf2ef4)
Compare | [480e3c83373f82f57c35a44d6c4215e7900e6abd](https://github.com/dotnet/runtime/commit/480e3c83373f82f57c35a44d6c4215e7900e6abd)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f2d5042ceaea5642bac6bde8a1a5765afcbf2ef4...480e3c83373f82f57c35a44d6c4215e7900e6abd)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Text.Json.Serialization.Tests.WriteJson<ImmutableDictionary<String, String>>

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

• [SerializeToUtf8Bytes - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config 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 'System.Text.Json.Serialization.Tests.WriteJson>*'
```

### System.Text.Json.Serialization.Tests.WriteJson<ImmutableDictionary<String, String>>.SerializeToUtf8Bytes(Mode: Reflection)

#### 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)