[Perf] Linux/x64: 1 Regression on 4/27/2026 5:43:00 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [985b17607b1b33d3988af0a4f021455073161ae8](https://github.com/dotnet/runtime/commit/985b17607b1b33d3988af0a4f021455073161ae8)
Compare | [db9e39fe6f0d64e07c6b975d834fac18f2a41e27](https://github.com/dotnet/runtime/commit/db9e39fe6f0d64e07c6b975d834fac18f2a41e27)
Diff | [Diff](https://github.com/dotnet/runtime/compare/985b17607b1b33d3988af0a4f021455073161ae8...db9e39fe6f0d64e07c6b975d834fac18f2a41e27)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

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

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

• [SerializeToString - 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Json.Serialization.Tests.WriteJson>*'
```

### System.Text.Json.Serialization.Tests.WriteJson<Dictionary<String, String>>.SerializeToString(Mode: SourceGen)

#### 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)