[Perf] Linux/arm64: 1 Improvement on 6/23/2026 2:47:31 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [fc23f447cfbddb07670e92dab98c794f0499d406](https://github.com/dotnet/runtime/commit/fc23f447cfbddb07670e92dab98c794f0499d406)
Compare | [461fd2adbf736b4298d9a0c58ad8dbcecaf83629](https://github.com/dotnet/runtime/commit/461fd2adbf736b4298d9a0c58ad8dbcecaf83629)
Diff | [Diff](https://github.com/dotnet/runtime/compare/fc23f447cfbddb07670e92dab98c794f0499d406...461fd2adbf736b4298d9a0c58ad8dbcecaf83629)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.Tests.DictionarySequentialKeys

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

• [ContainsKey_3k_Int_32ByteRefsValue - 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 'System.Collections.Tests.DictionarySequentialKeys*'
```

### System.Collections.Tests.DictionarySequentialKeys.ContainsKey_3k_Int_32ByteRefsValue

#### 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 the benchmark source in performance/src/benchmarks/micro/libraries/System.Collections/Dictionary/DictionarySequentialKeys.cs and run the supplied benchmarks_ci.py command. Compare the linked baseline, test report, and performance graphs for ContainsKey_3k_Int_32ByteRefsValue. The issue does not define a requested change or completion criterion, so confirm the result and expected next step with maintainers before modifying code.

Written by the indexing model from the issue text.