[Perf] Linux/x64: 2 Regressions on 8/30/2026 9:51:28 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [100002779ceec649fcfd00c233f673b494130827](https://github.com/dotnet/sdk/commit/100002779ceec649fcfd00c233f673b494130827)
Compare | [17974d44ef211135d3e9b0b84f5e03830dd59ad8](https://github.com/dotnet/sdk/commit/17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Diff | [Diff](https://github.com/dotnet/sdk/compare/100002779ceec649fcfd00c233f673b494130827...17974d44ef211135d3e9b0b84f5e03830dd59ad8)
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]()

| 2.72 μs | 3.17 μs | 1.17 | 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 | [100002779ceec649fcfd00c233f673b494130827](https://github.com/dotnet/sdk/commit/100002779ceec649fcfd00c233f673b494130827)
Compare | [17974d44ef211135d3e9b0b84f5e03830dd59ad8](https://github.com/dotnet/sdk/commit/17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Diff | [Diff](https://github.com/dotnet/sdk/compare/100002779ceec649fcfd00c233f673b494130827...17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Configs | CompilationMode:tiered, RunKind:akadeindexedset

### Regressions in Akade.IndexedSet.Benchmarks.RealWorld.EventSourcedAggregateCache.QueryBenchmarks

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

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

| 33.14 ns | 36.82 ns | 1.11 | 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.RealWorld.EventSourcedAggregateCache.QueryBenchmarks*'
```

### Akade.IndexedSet.Benchmarks.RealWorld.EventSourcedAggregateCache.QueryBenchmarks.GetViaPrimaryId

#### 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 and RealWorld/EventSourcedAggregateCache/QueryBenchmarks.cs, then run the benchmark commands in the two Repro sections on Ubuntu. Compare the baseline and test commits and use the linked reports to identify the source of both regressions. Done means the regressions are explained and the affected benchmarks no longer show the reported slowdown.

Written by the indexing model from the issue text.