pcre2 regexes can have an extra JIT compilation step that can improve performance of matching the regex.

The cost is two-fold: more RAM for the pattern and more time spent "compiling" the regex.

However, benchmarks show significant improvements up to 50% on micro-benchmarks that focus on regexes and up to 40% for real queries.

Compilation time penalty can be avoided by having a cache of pre-compiled regexes.