[Perf] Linux/x64: 2 Regressions on 6/29/2026 9:06:24 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [b97dd2f4b6aec05e98c71ec9830fa19de920af8b](https://github.com/dotnet/sdk/commit/b97dd2f4b6aec05e98c71ec9830fa19de920af8b)
Compare | [7c528f6e19c5245206de3dc561eb8a110bf9f746](https://github.com/dotnet/sdk/commit/7c528f6e19c5245206de3dc561eb8a110bf9f746)
Diff | [Diff](https://github.com/dotnet/sdk/compare/b97dd2f4b6aec05e98c71ec9830fa19de920af8b...7c528f6e19c5245206de3dc561eb8a110bf9f746)
Configs | CompilationMode:tiered, RunKind:akadeindexedset

### Regressions in Akade.IndexedSet.Benchmarks.RangeIndexBenchmarks

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

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

| 2.71 μs | 3.27 μs | 1.21 | 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.RangeIndexBenchmarks*'
```

### Akade.IndexedSet.Benchmarks.RangeIndexBenchmarks.Range_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 | [b97dd2f4b6aec05e98c71ec9830fa19de920af8b](https://github.com/dotnet/sdk/commit/b97dd2f4b6aec05e98c71ec9830fa19de920af8b)
Compare | [7c528f6e19c5245206de3dc561eb8a110bf9f746](https://github.com/dotnet/sdk/commit/7c528f6e19c5245206de3dc561eb8a110bf9f746)
Diff | [Diff](https://github.com/dotnet/sdk/compare/b97dd2f4b6aec05e98c71ec9830fa19de920af8b...7c528f6e19c5245206de3dc561eb8a110bf9f746)
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]()

| 13.86 ns | 17.19 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)

Start with src/benchmarks/real-world/Akade.IndexedSet.Benchmarks/RangeIndexBenchmarks.cs lines 30-36 and ConcurrentSetBenchmarks.cs lines 58-62. Run benchmarks_ci.py with the provided filters and compare the results with the linked baseline and test reports. Done means the reported regressions are explained and the affected benchmarks no longer regress.

Written by the indexing model from the issue text.