[Perf] Windows/x86: 5 Improvements on 5/27/2026 9:15:14 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ac7b8a0391e871a3b07bec217d87cf275423016f](https://github.com/dotnet/runtime/commit/ac7b8a0391e871a3b07bec217d87cf275423016f)
Compare | [832949cd5f36aac20268e974fd07b3ffc73acdfd](https://github.com/dotnet/runtime/commit/832949cd5f36aac20268e974fd07b3ffc73acdfd)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ac7b8a0391e871a3b07bec217d87cf275423016f...832949cd5f36aac20268e974fd07b3ffc73acdfd)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.Encodings.Web.Tests.Perf_Encoders

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

• [EncodeUtf16 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 67.68 ns | 56.54 ns | 0.84 | 0.05 | False | | |
|

• [EncodeUtf16 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 28.34 ns | 25.69 ns | 0.91 | 0.04 | False | | |
|

• [EncodeUtf16 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 85.93 ns | 78.75 ns | 0.92 | 0.07 | False | | |
|

• [EncodeUtf16 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 81.74 ns | 75.22 ns | 0.92 | 0.01 | False | | |

![graph]()
![graph]()
![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.Text.Encodings.Web.Tests.Perf_Encoders*'
```

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: Url,&lorem ipsum=dolor sit amet,16)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: UnsafeRelaxed,hello "there",16)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: Url,&lorem ipsum=dolor sit amet,512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf16(arguments: JavaScript,&Hello+<World>!,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 | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [ac7b8a0391e871a3b07bec217d87cf275423016f](https://github.com/dotnet/runtime/commit/ac7b8a0391e871a3b07bec217d87cf275423016f)
Compare | [832949cd5f36aac20268e974fd07b3ffc73acdfd](https://github.com/dotnet/runtime/commit/832949cd5f36aac20268e974fd07b3ffc73acdfd)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ac7b8a0391e871a3b07bec217d87cf275423016f...832949cd5f36aac20268e974fd07b3ffc73acdfd)
Configs | CompilationMode:tiered, RunKind:micro

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

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

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

| 2.30 μs | 2.15 μs | 0.94 | 0.02 | 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.RemoveFalse*'
```

### System.Collections.RemoveFalse<Int32>.HashSet(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 src/benchmarks/micro/libraries/System.Text.Encodings.Web/Perf.Encoders.cs and src/benchmarks/micro/libraries/System.Collections/Remove/RemoveFalse.cs. Run the provided benchmarks_ci.py commands and inspect the linked reports and baseline/compare commits. The issue does not define a code change or acceptance criterion, so triage must first establish what action and result count as done.

Written by the indexing model from the issue text.