[Perf] Windows/x64: 2 Improvements on 5/28/2026 7:26:44 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [50b8d1a7b7bb9c76b4332d44e7093a98ddc8228b](https://github.com/dotnet/runtime/commit/50b8d1a7b7bb9c76b4332d44e7093a98ddc8228b)
Compare | [df1507806b4e2cd19bde86e5a945bd4bfd7839f5](https://github.com/dotnet/runtime/commit/df1507806b4e2cd19bde86e5a945bd4bfd7839f5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50b8d1a7b7bb9c76b4332d44e7093a98ddc8228b...df1507806b4e2cd19bde86e5a945bd4bfd7839f5)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.CtorFromCollection<String>

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

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

| 3.93 μs | 3.13 μs | 0.80 | 0.01 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CtorFromCollection*'
```

### System.Collections.CtorFromCollection<String>.Dictionary(Size: 512)

#### 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 | Windows 10.0.22631
Queue | ViperWindows
Baseline | [2a546738e968e3f75092657d4bee6bd21821e069](https://github.com/dotnet/runtime/commit/2a546738e968e3f75092657d4bee6bd21821e069)
Compare | [54cfeb453970e794043c71448a60a39b4fee3a38](https://github.com/dotnet/runtime/commit/54cfeb453970e794043c71448a60a39b4fee3a38)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2a546738e968e3f75092657d4bee6bd21821e069...54cfeb453970e794043c71448a60a39b4fee3a38)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.CreateAddAndClear<String>

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

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

| 165.97 μs | 154.59 μs | 0.93 | 0.29 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CreateAddAndClear*'
```

### System.Collections.CreateAddAndClear<String>.ImmutableDictionary(Size: 512)

#### 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)