[Perf] Windows/x64: 1 Improvement on 8/5/2026 11:16:49 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [173e6b40e02cd1652102c09e07bd4cf7320b3d4d](https://github.com/dotnet/runtime/commit/173e6b40e02cd1652102c09e07bd4cf7320b3d4d)
Compare | [ecc21b8a08df017dbe4d92e81191a028213d418e](https://github.com/dotnet/runtime/commit/ecc21b8a08df017dbe4d92e81191a028213d418e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/173e6b40e02cd1652102c09e07bd4cf7320b3d4d...ecc21b8a08df017dbe4d92e81191a028213d418e)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.CreateAddAndClear<String>

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

• [ConcurrentBag - 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.Collections.CreateAddAndClear*'
```

### System.Collections.CreateAddAndClear<String>.ConcurrentBag(Size: 512)

#### 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 src/benchmarks/micro/libraries/System.Collections/CreateAddAndClear.cs#L229-L239 and follow docs/benchmarking-workflow-dotnet-runtime.md. Reproduce the ConcurrentBag benchmark with the provided command, inspect the linked report, and clarify with maintainers what optimization is expected; done requires a validated change with benchmark evidence.

Written by the indexing model from the issue text.