[Perf] Linux/x64: 2 Regressions on 5/6/2026 10:01:09 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [c59aad41c35dd3c0c50da3bbb04c540ad59eb0e6](https://github.com/dotnet/sdk/commit/c59aad41c35dd3c0c50da3bbb04c540ad59eb0e6)
Compare | [b37e00fee8d2a9755ef4403a13f43f27ba52e601](https://github.com/dotnet/sdk/commit/b37e00fee8d2a9755ef4403a13f43f27ba52e601)
Diff | [Diff](https://github.com/dotnet/sdk/compare/c59aad41c35dd3c0c50da3bbb04c540ad59eb0e6...b37e00fee8d2a9755ef4403a13f43f27ba52e601)
Configs | CompilationMode:tiered, RunKind:akadeindexedset

### Regressions in Akade.IndexedSet.Benchmarks.PrefixIndexBenchmarks

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

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

| 510.07 ns | 574.96 ns | 1.13 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'Akade.IndexedSet.Benchmarks.PrefixIndexBenchmarks*'
```

### Akade.IndexedSet.Benchmarks.PrefixIndexBenchmarks.StartsWith_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)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [c59aad41c35dd3c0c50da3bbb04c540ad59eb0e6](https://github.com/dotnet/sdk/commit/c59aad41c35dd3c0c50da3bbb04c540ad59eb0e6)
Compare | [b37e00fee8d2a9755ef4403a13f43f27ba52e601](https://github.com/dotnet/sdk/commit/b37e00fee8d2a9755ef4403a13f43f27ba52e601)
Diff | [Diff](https://github.com/dotnet/sdk/compare/c59aad41c35dd3c0c50da3bbb04c540ad59eb0e6...b37e00fee8d2a9755ef4403a13f43f27ba52e601)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

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

| 13.70 ns | 16.95 ns | 1.24 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'Akade.IndexedSet.Benchmarks.ConcurrentSetBenchmarks*'
```

### Akade.IndexedSet.Benchmarks.ConcurrentSetBenchmarks.LessThanLookup

#### 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)