[Perf] Linux/x64: 3 Regressions on 6/9/2026 6:15:12 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [3aa31206d7e27ec9bb334c36b08e173bc78a11d0](https://github.com/dotnet/runtime/commit/3aa31206d7e27ec9bb334c36b08e173bc78a11d0)
Compare | [65937ca43416615d941a93c9f33ad4b1acfb7b58](https://github.com/dotnet/runtime/commit/65937ca43416615d941a93c9f33ad4b1acfb7b58)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3aa31206d7e27ec9bb334c36b08e173bc78a11d0...65937ca43416615d941a93c9f33ad4b1acfb7b58)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.Runtime.Intrinsics.Tests.Perf_Vector128Of<Single>

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

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

| 1.74 ns | 210.53 ns | 121.09 | 0.51 | 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.Runtime.Intrinsics.Tests.Perf_Vector128Of*'
```

### System.Runtime.Intrinsics.Tests.Perf_Vector128Of<Single>.BitwiseAndOperatorBenchmark

#### 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 | [3aa31206d7e27ec9bb334c36b08e173bc78a11d0](https://github.com/dotnet/runtime/commit/3aa31206d7e27ec9bb334c36b08e173bc78a11d0)
Compare | [65937ca43416615d941a93c9f33ad4b1acfb7b58](https://github.com/dotnet/runtime/commit/65937ca43416615d941a93c9f33ad4b1acfb7b58)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3aa31206d7e27ec9bb334c36b08e173bc78a11d0...65937ca43416615d941a93c9f33ad4b1acfb7b58)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.Text.Json.Tests.Utf8JsonReaderCommentsTests

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

• [Utf8JsonReaderCommentParsing - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 113.74 ns | 124.56 ns | 1.10 | 0.14 | 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.Text.Json.Tests.Utf8JsonReaderCommentsTests*'
```

### System.Text.Json.Tests.Utf8JsonReaderCommentsTests.Utf8JsonReaderCommentParsing(CommentHandling: Allow, SegmentSize: 0, TestCase: ShortSingleLine)

#### 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 | [3aa31206d7e27ec9bb334c36b08e173bc78a11d0](https://github.com/dotnet/runtime/commit/3aa31206d7e27ec9bb334c36b08e173bc78a11d0)
Compare | [65937ca43416615d941a93c9f33ad4b1acfb7b58](https://github.com/dotnet/runtime/commit/65937ca43416615d941a93c9f33ad4b1acfb7b58)
Diff | [Diff](https://github.com/dotnet/runtime/compare/3aa31206d7e27ec9bb334c36b08e173bc78a11d0...65937ca43416615d941a93c9f33ad4b1acfb7b58)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.Runtime.Intrinsics.Tests.Perf_Vector128Of<UInt32>

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

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

| 0.91 ns | 200.00 ns | 220.90 | 0.51 | 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.Runtime.Intrinsics.Tests.Perf_Vector128Of*'
```

### System.Runtime.Intrinsics.Tests.Perf_Vector128Of<UInt32>.ZeroBenchmark

#### 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)