[Perf] Linux/x64: 3 Improvements on 1/27/2026 2:19:52 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [4bab919a412b3fb248ece71cbd41091a8a9a1fe8](https://github.com/dotnet/runtime/commit/4bab919a412b3fb248ece71cbd41091a8a9a1fe8)
Compare | [871446da065ff50e5562c64086f63aaab691342e](https://github.com/dotnet/runtime/commit/871446da065ff50e5562c64086f63aaab691342e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4bab919a412b3fb248ece71cbd41091a8a9a1fe8...871446da065ff50e5562c64086f63aaab691342e)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in PerfLabTests.LowLevelPerf

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

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

| 162.68 μs | 135.58 μs | 0.83 | 0.03 | 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 'PerfLabTests.LowLevelPerf*'
```

### PerfLabTests.LowLevelPerf.SealedClassInterfaceMethod

#### 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 | [4bab919a412b3fb248ece71cbd41091a8a9a1fe8](https://github.com/dotnet/runtime/commit/4bab919a412b3fb248ece71cbd41091a8a9a1fe8)
Compare | [871446da065ff50e5562c64086f63aaab691342e](https://github.com/dotnet/runtime/commit/871446da065ff50e5562c64086f63aaab691342e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/4bab919a412b3fb248ece71cbd41091a8a9a1fe8...871446da065ff50e5562c64086f63aaab691342e)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig

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]()

| 182.29 ms | 133.05 ms | 0.73 | 0.01 | False | | |
|

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

| 187.94 ms | 150.43 ms | 0.80 | 0.00 | 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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig.Count(Pattern: ".{0,2}(Tom|Sawyer|Huckleberry|Finn)", Options: Compiled)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.RegularExpressions.Tests.Perf_Regex_Industry_Leipzig.Count(Pattern: ".{2,4}(Tom|Sawyer|Huckleberry|Finn)", Options: Compiled)

#### 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)