[Perf] Windows/x86: 5 Regressions on 2/25/2026 4:52:28 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [689ceb67fa96c64772fe4bb87518aa8635f4a314](https://github.com/dotnet/runtime/commit/689ceb67fa96c64772fe4bb87518aa8635f4a314)
Compare | [133c7bde3fb7dd914f423ffb3e408cc61787e0bb](https://github.com/dotnet/runtime/commit/133c7bde3fb7dd914f423ffb3e408cc61787e0bb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/689ceb67fa96c64772fe4bb87518aa8635f4a314...133c7bde3fb7dd914f423ffb3e408cc61787e0bb)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Int32>

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

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

| 5.70 ns | 9.33 ns | 1.64 | 0.57 | False | | |
|

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

| 9.14 ns | 15.08 ns | 1.65 | 0.65 | False | | |
|

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

| 9.93 ns | 12.23 ns | 1.23 | 0.52 | False | | |
|

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

| 269.70 ns | 308.54 ns | 1.14 | 0.35 | False | | |

[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.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives*'
```

### System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Int32>.SumOfSquares(BufferLength: 128)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Int32>.Add_Scalar(BufferLength: 128)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Int32>.Negate(BufferLength: 128)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Int32>.Max_Vector(BufferLength: 3079)

#### 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 | [ae967feaba47c945884fb6ce232621e8616864f8](https://github.com/dotnet/runtime/commit/ae967feaba47c945884fb6ce232621e8616864f8)
Compare | [d63c175469bcaa3f3d5bc73aa6fd108bbf00797b](https://github.com/dotnet/runtime/commit/d63c175469bcaa3f3d5bc73aa6fd108bbf00797b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ae967feaba47c945884fb6ce232621e8616864f8...d63c175469bcaa3f3d5bc73aa6fd108bbf00797b)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Text.RegularExpressions.Tests.Perf_Regex_Industry_SliceSlice

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

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

| 994.54 ms | 1.93 secs | 1.94 | 0.01 | False | | |

[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.RegularExpressions.Tests.Perf_Regex_Industry_SliceSlice*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_SliceSlice.Count(Options: IgnoreCase, NonBacktracking)

#### 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)