[Perf] Linux/x64: 4 Improvements on 8/13/2026 4:11:41 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [63ae268826a5091dfc89baa49844df1aed874a95](https://github.com/dotnet/runtime/commit/63ae268826a5091dfc89baa49844df1aed874a95)
Compare | [d00a0a24912957046ed2443adc0af7bbfb4c43bc](https://github.com/dotnet/runtime/commit/d00a0a24912957046ed2443adc0af7bbfb4c43bc)
Diff | [Diff](https://github.com/dotnet/runtime/compare/63ae268826a5091dfc89baa49844df1aed874a95...d00a0a24912957046ed2443adc0af7bbfb4c43bc)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Improvements in Microsoft.Extensions.Caching.Memory.Tests.MemoryCacheTests

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

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

| 3.47 μs | 2.09 μs | 0.60 | 0.24 | False | | |
|

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

| 3.12 μs | 2.02 μs | 0.65 | 0.23 | False | | |

![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 'Microsoft.Extensions.Caching.Memory.Tests.MemoryCacheTests*'
```

### Microsoft.Extensions.Caching.Memory.Tests.MemoryCacheTests.TryGetValueHit

#### ETL Files

#### Histogram

#### JIT Disasms

### Microsoft.Extensions.Caching.Memory.Tests.MemoryCacheTests.TryGetValueMiss

#### 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 | [63ae268826a5091dfc89baa49844df1aed874a95](https://github.com/dotnet/runtime/commit/63ae268826a5091dfc89baa49844df1aed874a95)
Compare | [d00a0a24912957046ed2443adc0af7bbfb4c43bc](https://github.com/dotnet/runtime/commit/d00a0a24912957046ed2443adc0af7bbfb4c43bc)
Diff | [Diff](https://github.com/dotnet/runtime/compare/63ae268826a5091dfc89baa49844df1aed874a95...d00a0a24912957046ed2443adc0af7bbfb4c43bc)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Improvements in System.Collections.Perf_Frozen<ReferenceType>

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

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

| 685.44 μs | 475.03 μs | 0.69 | 0.41 | False | | |

![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_Frozen*'
```

### System.Collections.Perf_Frozen<ReferenceType>.ToFrozenSet(Count: 64)

#### 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 | [63ae268826a5091dfc89baa49844df1aed874a95](https://github.com/dotnet/runtime/commit/63ae268826a5091dfc89baa49844df1aed874a95)
Compare | [d00a0a24912957046ed2443adc0af7bbfb4c43bc](https://github.com/dotnet/runtime/commit/d00a0a24912957046ed2443adc0af7bbfb4c43bc)
Diff | [Diff](https://github.com/dotnet/runtime/compare/63ae268826a5091dfc89baa49844df1aed874a95...d00a0a24912957046ed2443adc0af7bbfb4c43bc)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Improvements in PerfLabTests.CastingPerf

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

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

| 808.40 ns | 556.87 ns | 0.69 | 0.25 | False | | |

![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 'PerfLabTests.CastingPerf*'
```

### PerfLabTests.CastingPerf.CheckArrayIsArrayByVariance

#### 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 linked performance reports and the benchmark sources in src/benchmarks/micro/libraries/Microsoft.Extensions.Caching.Memory/MemoryCacheTests.cs, src/benchmarks/micro/libraries/System.Collections/Frozen/Perf_Frozen.cs, and src/benchmarks/micro/runtime/perflab/CastingPerf.cs. Run the provided benchmarks_ci.py filters to reproduce the measurements and compare them with the listed baseline. The issue does not specify a code change or acceptance criterion, so triage must first identify what should be investigated.

Written by the indexing model from the issue text.