refactor: move regexp compilation outside function

[jooola]

This improves the performances a bit.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.56%. Comparing base (756f605) to head (7bad6e8).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #485 +/- ## ========================================== - Coverage 71.56% 71.56% -0.01% ========================================== Files 45 45 Lines 3904 3903 -1 ========================================== - Hits 2794 2793 -1 Misses 696 696 Partials 414 414 ```

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