[Perf] Linux/x64: 2 Improvements on 7/29/2026 2:44:38 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [00fc09ea5b2e39c46d56fda130b6693e07d449d8](https://github.com/dotnet/runtime/commit/00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Compare | [0a25043f48f83ecfa896966929f25f792463344b](https://github.com/dotnet/runtime/commit/0a25043f48f83ecfa896966929f25f792463344b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/00fc09ea5b2e39c46d56fda130b6693e07d449d8...0a25043f48f83ecfa896966929f25f792463344b)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

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

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

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

| 1130.98 μs | 546.00 μs | 0.48 | 0.31 | 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.CreateAddAndClear*'
```

### System.Collections.CreateAddAndClear<String>.ICollection(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 | [975877333c98d9d08bad66670d74accc6047be34](https://github.com/dotnet/runtime/commit/975877333c98d9d08bad66670d74accc6047be34)
Compare | [0a25043f48f83ecfa896966929f25f792463344b](https://github.com/dotnet/runtime/commit/0a25043f48f83ecfa896966929f25f792463344b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/975877333c98d9d08bad66670d74accc6047be34...0a25043f48f83ecfa896966929f25f792463344b)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Improvements in System.Collections.Tests.Perf_PriorityQueue<String, String>

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

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

| 5.89 ms | 3.60 ms | 0.61 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.Tests.Perf_PriorityQueue*'
```

### System.Collections.Tests.Perf_PriorityQueue<String, String>.K_Max_Elements(Size: 1000)

#### 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 sources src/benchmarks/micro/libraries/System.Collections/CreateAddAndClear.cs and src/benchmarks/micro/libraries/System.Collections/PriorityQueue/Perf_PriorityQueue.cs, then read the linked benchmarking workflow. Reproduce the reported benchmarks with scripts/benchmarks_ci.py and compare the supplied reports; the issue provides no implementation target or acceptance criterion, so triage must establish what follow-up is needed before work can be considered done.

Written by the indexing model from the issue text.