tree d7637a8c4234731b6903a0e1fa487ce5c8a61f35
parent 0ccc2e29d4b9ce0f54f9e50fa6df85522083c5de
author correctmost <134317971+correctmost@users.noreply.github.com> 1715370418 -0400
committer Daniël van Noord <13665637+DanielNoord@users.noreply.github.com> 1715414561 +0200

Improve performance of _get_zipimporters

_get_zipimporters can call isinstance millions of times when
running pylint's import-error checker on a codebase like yt-dlp.

Checking for None first avoids the overhead of invoking isinstance.

Closes pylint-dev/pylint#9607.