New submission from Nick Coghlan <ncogh...@gmail.com>: Due to a python-ideas discussion about reducing boilerplate for __file__-relative path calculations, I was running "./python -X importtime -S -c 'import pathlib'" and noticed three potential candidates where it may be worthwhile deferring the imports until the modules are actually needed:
- re (used in _WildcardSelector) - fnmatch (used in PurePath.match and _WildcardSelector) - urllib.parse (used in PurePath.as_uri, by way of self._flavour.make_uri) Using an optimised Python 3.7 on an SSD with warm disk caches, commenting out those 3 imports reduced my typical import times for pathlib from 12-13 ms to 7-8 ms) ---------- components: Library (Lib) messages: 316266 nosy: ncoghlan, njs, pitrou priority: normal severity: normal status: open title: Possible lazy import opportunities in `pathlib` type: performance versions: Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33440> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
