[Perf] Linux/arm64: 1 Improvement on 8/25/2026 11:54:37 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [6d57017f1cbf04efa931389d38ca4755e4da8add](https://github.com/dotnet/runtime/commit/6d57017f1cbf04efa931389d38ca4755e4da8add)
Compare | [519e88bf80b5d39bc2c4e788a025a499136a1661](https://github.com/dotnet/runtime/commit/519e88bf80b5d39bc2c4e788a025a499136a1661)
Diff | [Diff](https://github.com/dotnet/runtime/compare/6d57017f1cbf04efa931389d38ca4755e4da8add...519e88bf80b5d39bc2c4e788a025a499136a1661)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.Tests.Perf_StringBuilder

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

• [Append_ValueTypes_Interpolated - 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.Tests.Perf_StringBuilder*'
```

### System.Text.Tests.Perf_StringBuilder.Append_ValueTypes_Interpolated

#### 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 benchmark source at performance/src/benchmarks/micro/libraries/System.Text/Perf.StringBuilder.cs#L184-L203, then run the provided benchmarks_ci.py command for System.Text.Tests.Perf_StringBuilder. Compare the reported arm64 AzureLinux result with the linked baseline and test commits; completion is not defined in the issue, so confirm the cause and expected runtime change with maintainers before proceeding.

Written by the indexing model from the issue text.