[Perf] Windows/x86: 3 Improvements on 8/5/2026 1:23:13 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ac85c6849c56dcb47e036b2a729c1e99dc413bab](https://github.com/dotnet/runtime/commit/ac85c6849c56dcb47e036b2a729c1e99dc413bab)
Compare | [c8f97975ab0d8ff84aebf176829e17f7c7052f03](https://github.com/dotnet/runtime/commit/c8f97975ab0d8ff84aebf176829e17f7c7052f03)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ac85c6849c56dcb47e036b2a729c1e99dc413bab...c8f97975ab0d8ff84aebf176829e17f7c7052f03)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Tests.Perf_Uri

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

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

| 6.43 μs | 5.39 μs | 0.84 | 0.07 | False | | |
|

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

| 9.79 μs | 8.68 μs | 0.89 | 0.07 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_Uri*'
```

### System.Tests.Perf_Uri.EscapeDataString(input: "{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Uri.EscapeDataString(input: "a{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{üa{ü")

#### 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 | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ac85c6849c56dcb47e036b2a729c1e99dc413bab](https://github.com/dotnet/runtime/commit/ac85c6849c56dcb47e036b2a729c1e99dc413bab)
Compare | [c8f97975ab0d8ff84aebf176829e17f7c7052f03](https://github.com/dotnet/runtime/commit/c8f97975ab0d8ff84aebf176829e17f7c7052f03)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ac85c6849c56dcb47e036b2a729c1e99dc413bab...c8f97975ab0d8ff84aebf176829e17f7c7052f03)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Collections.IterateForEach<Int32>

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

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

| 283.51 ns | 152.67 ns | 0.54 | 0.43 | 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.IterateForEach*'
```

### System.Collections.IterateForEach<Int32>.FrozenDictionary(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)

Start with the benchmark sources at src/benchmarks/micro/libraries/System.Runtime/Perf.Uri.cs and src/benchmarks/micro/libraries/System.Collections/Iterate/IterateForEach.cs, then run the two benchmark commands in the Repro sections. Compare the generated results with the linked reports and determine whether the reported improvements require a runtime change; done means the finding is validated and triaged.

Written by the indexing model from the issue text.