[Perf] Windows/x86: 1 Regression on 7/23/2026 1:41:19 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ca428fea1ed3f9ee0eb4adb6879f5146c0f39e92](https://github.com/dotnet/runtime/commit/ca428fea1ed3f9ee0eb4adb6879f5146c0f39e92)
Compare | [54549c8df1cdbd7b373b56a53104439e75bcfcbd](https://github.com/dotnet/runtime/commit/54549c8df1cdbd7b373b56a53104439e75bcfcbd)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ca428fea1ed3f9ee0eb4adb6879f5146c0f39e92...54549c8df1cdbd7b373b56a53104439e75bcfcbd)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Collections.Tests.Add_Remove_SteadyState<Int32>

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

• [ImmutableQueue - 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.Tests.Add_Remove_SteadyState*'
```

### System.Collections.Tests.Add_Remove_SteadyState<Int32>.ImmutableQueue(Count: 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/AddRemove/AddRemoveSteadyState.cs and run the provided benchmarks_ci.py command for System.Collections.Tests.Add_Remove_SteadyState. Compare the 17.21 ns baseline with the 18.29 ns result and the linked commit diff; done means the cause is confirmed and the ImmutableQueue regression no longer reproduces.

Written by the indexing model from the issue text.