[Perf] Windows/x64: 2 Regressions on 5/6/2026 9:58:04 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [4c4e7f410fc876590f219fc6022b6c18d6f6a475](https://github.com/dotnet/sdk/commit/4c4e7f410fc876590f219fc6022b6c18d6f6a475)
Compare | [c802bb0f0b272d8547b12719c604c65f6beb1912](https://github.com/dotnet/sdk/commit/c802bb0f0b272d8547b12719c604c65f6beb1912)
Diff | [Diff](https://github.com/dotnet/sdk/compare/4c4e7f410fc876590f219fc6022b6c18d6f6a475...c802bb0f0b272d8547b12719c604c65f6beb1912)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

• [ConcurrentLessThanLookup - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 24.92 ns | 32.02 ns | 1.28 | 0.00 | True | | |

![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.ConcurrentLessThanLookup

#### 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)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [4c4e7f410fc876590f219fc6022b6c18d6f6a475](https://github.com/dotnet/sdk/commit/4c4e7f410fc876590f219fc6022b6c18d6f6a475)
Compare | [c802bb0f0b272d8547b12719c604c65f6beb1912](https://github.com/dotnet/sdk/commit/c802bb0f0b272d8547b12719c604c65f6beb1912)
Diff | [Diff](https://github.com/dotnet/sdk/compare/4c4e7f410fc876590f219fc6022b6c18d6f6a475...c802bb0f0b272d8547b12719c604c65f6beb1912)
Configs | CompilationMode:tiered, RunKind:akadeindexedset

### Regressions in Akade.IndexedSet.Benchmarks.FullTextIndexBenchmarks

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

• [Contains_IndexedSet - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 406.92 ns | 457.43 ns | 1.12 | 0.00 | True | | |

![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.FullTextIndexBenchmarks*'
```

### Akade.IndexedSet.Benchmarks.FullTextIndexBenchmarks.Contains_IndexedSet

#### 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 and FullTextIndexBenchmarks.cs, then run the supplied benchmarks_ci.py commands on Windows. Compare the reported baseline and test results for ConcurrentLessThanLookup and Contains_IndexedSet, and use the linked reports and commit diff to identify the regression. Done means the regressions are explained and addressed or triaged with supporting benchmark results.

Written by the indexing model from the issue text.