[Perf] Linux/x64: 1 Regression on 3/19/2026 2:48:42 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [01ee086359f0b721e47c9746aba5d8e95f7de970](https://github.com/dotnet/runtime/commit/01ee086359f0b721e47c9746aba5d8e95f7de970)
Compare | [1f751dacd08cf7599c64d7c243c52f85c54cb979](https://github.com/dotnet/runtime/commit/1f751dacd08cf7599c64d7c243c52f85c54cb979)
Diff | [Diff](https://github.com/dotnet/runtime/compare/01ee086359f0b721e47c9746aba5d8e95f7de970...1f751dacd08cf7599c64d7c243c52f85c54cb979)
Configs | CompilationMode:wasm, RunKind:micro

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

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

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

| 60.09 μs | 70.13 μs | 1.17 | 0.06 | 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.RegularExpressions.Tests.Perf_Regex_Common*'
```

### System.Text.RegularExpressions.Tests.Perf_Regex_Common.CtorInvoke(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)

Start with the benchmark source at src/benchmarks/micro/libraries/System.Text.RegularExpressions/Perf.Regex.Common.cs and the benchmarking workflow linked in the issue. Run the provided benchmarks_ci.py command for Perf_Regex_Common, then compare the baseline and test commits and inspect the linked report. Done means confirming and triaging the CtorInvoke compiled-regex regression with evidence for the next fix.

Written by the indexing model from the issue text.