[Perf] Linux/x64: 4 Improvements on 5/18/2026 7:17:35 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [b540c365da5e5f71a6c0389f5764f363bc59d4a2](https://github.com/dotnet/runtime/commit/b540c365da5e5f71a6c0389f5764f363bc59d4a2)
Compare | [5fe0d4923d742a55079b3016f38e91e2c1b58663](https://github.com/dotnet/runtime/commit/5fe0d4923d742a55079b3016f38e91e2c1b58663)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b540c365da5e5f71a6c0389f5764f363bc59d4a2...5fe0d4923d742a55079b3016f38e91e2c1b58663)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

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

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

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

| 1628.54 μs | 892.86 μs | 0.55 | 0.30 | False | | |
|

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

| 23.24 ms | 20.51 ms | 0.88 | 0.36 | 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 'System.Collections.CtorFromCollection*'
```

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

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.CtorFromCollection<String>.SortedDictionary(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 | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [b540c365da5e5f71a6c0389f5764f363bc59d4a2](https://github.com/dotnet/runtime/commit/b540c365da5e5f71a6c0389f5764f363bc59d4a2)
Compare | [5fe0d4923d742a55079b3016f38e91e2c1b58663](https://github.com/dotnet/runtime/commit/5fe0d4923d742a55079b3016f38e91e2c1b58663)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b540c365da5e5f71a6c0389f5764f363bc59d4a2...5fe0d4923d742a55079b3016f38e91e2c1b58663)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|

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

| 39.23 μs | 18.42 μs | 0.47 | 0.39 | 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>.TryGetValue_True(Count: 4)

#### 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 | [b540c365da5e5f71a6c0389f5764f363bc59d4a2](https://github.com/dotnet/runtime/commit/b540c365da5e5f71a6c0389f5764f363bc59d4a2)
Compare | [5fe0d4923d742a55079b3016f38e91e2c1b58663](https://github.com/dotnet/runtime/commit/5fe0d4923d742a55079b3016f38e91e2c1b58663)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b540c365da5e5f71a6c0389f5764f363bc59d4a2...5fe0d4923d742a55079b3016f38e91e2c1b58663)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

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

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

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

| 39.85 ms | 30.61 ms | 0.77 | 0.38 | 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.CreateAddAndRemove*'
```

### System.Collections.CreateAddAndRemove<String>.SortedList(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)