[Perf] Linux/arm64: 3 Improvements on 2/6/2026 4:03:15 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [0402dfab8379640fc944febe06a235640be65212](https://github.com/dotnet/runtime/commit/0402dfab8379640fc944febe06a235640be65212)
Compare | [dc199f7485be1f3e59f7273889157fa1ad975884](https://github.com/dotnet/runtime/commit/dc199f7485be1f3e59f7273889157fa1ad975884)
Diff | [Diff](https://github.com/dotnet/runtime/compare/0402dfab8379640fc944febe06a235640be65212...dc199f7485be1f3e59f7273889157fa1ad975884)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.Perf_LengthBucketsFrozenDictionary

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

• [TryGetValue_True_FrozenDictionary - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 138.99 ns | 128.16 ns | 0.92 | 0.01 | False | | |
|

• [TryGetValue_True_FrozenDictionary - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 16.38 μs | 15.14 μs | 0.92 | 0.01 | False | | |
|

• [TryGetValue_True_FrozenDictionary - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 1.45 μs | 1.35 μs | 0.93 | 0.01 | False | | |

![graph]()
![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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.Perf_LengthBucketsFrozenDictionary*'
```

### System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 10, ItemsPerBucket: 5)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 1000, ItemsPerBucket: 5)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 100, ItemsPerBucket: 5)

#### 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)