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[3.12] GH-105113: Improve performance of pathlib.PurePath.match() #105114

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May 31, 2023

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@barneygale barneygale commented May 30, 2023

We now compile an re.Pattern object for the entire pattern. This is made more difficult by fnmatch not treating directory separators as special when evaluating wildcards (*, ?, etc), and so we arrange the path parts onto separate lines in a string, and ensure we don't set re.DOTALL.

Partial backport of #101398 (excludes support for ** wildcards).


📚 Documentation preview 📚: https://cpython-previews--105114.org.readthedocs.build/

We now compile a `re.Pattern` object for the entire pattern. This is made
more difficult by `fnmatch` not treating directory separators as special
when evaluating wildcards (`*`, `?`, etc), and so we arrange the path parts
onto separate *lines* in a string, and ensure we don't set `re.DOTALL`.

Co-authored-by: Hugo van Kemenade <[email protected]>
Co-authored-by: Alex Waygood <[email protected]>
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