[Perf] Windows/x64: 1 Regression on 7/1/2026 8:57:11 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [3e328deefbd3029c2f957050c508b4faeee3d71f](https://github.com/dotnet/sdk/commit/3e328deefbd3029c2f957050c508b4faeee3d71f)
Compare | [a9679a8de87742e170318ea39f7f0e2874bcd441](https://github.com/dotnet/sdk/commit/a9679a8de87742e170318ea39f7f0e2874bcd441)
Diff | [Diff](https://github.com/dotnet/sdk/compare/3e328deefbd3029c2f957050c508b4faeee3d71f...a9679a8de87742e170318ea39f7f0e2874bcd441)
Configs | CompilationMode:tiered, RunKind:akadeindexedset

### Regressions in Akade.IndexedSet.Benchmarks.ConcurrentSetBenchmarks

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

• [FullTextLookup - 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 'Akade.IndexedSet.Benchmarks.ConcurrentSetBenchmarks*'
```

### Akade.IndexedSet.Benchmarks.ConcurrentSetBenchmarks.FullTextLookup

#### 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 src/benchmarks/real-world/Akade.IndexedSet.Benchmarks/ConcurrentSetBenchmarks.cs at lines 70-74 and run the provided benchmarks_ci.py command for the ConcurrentSetBenchmarks filter. Compare the baseline and test commits and use the linked report to investigate the FullTextLookup regression. Done means the regression is explained and the benchmark no longer shows the performance drop.

Written by the indexing model from the issue text.