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GH-125413: pathlib ABCs: use scandir() to speed up glob() (#126261)

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Use the new `PathBase.scandir()` method in `PathBase.glob()`, which greatly
reduces the number of `PathBase.stat()` calls needed when globbing.

There are no user-facing changes, because the pathlib ABCs are still
private and `Path.glob()` doesn't use the implementation in its superclass.
This commit is contained in:
Barney Gale 2024-11-01 17:48:58 +00:00 • committed by GitHub
parent 464a7a91d0
commit 68a51e0178
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3 changed files with 10 additions and 25 deletions
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14
Lib/pathlib/_abc.py
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@ -94,25 +94,13 @@ class PathGlobber(_GlobberBase):
lexists = operator.methodcaller('exists', follow_symlinks=False)
add_slash = operator.methodcaller('joinpath', '')
@staticmethod
def scandir(path):
"""Emulates os.scandir(), which returns an object that can be used as
a context manager. This method is called by walk() and glob().
"""
import contextlib
return contextlib.nullcontext(path.iterdir())
scandir = operator.methodcaller('scandir')
@staticmethod
def concat_path(path, text):
"""Appends text to the given path."""
return path.with_segments(path._raw_path + text)
@staticmethod
def parse_entry(entry):
"""Returns the path of an entry yielded from scandir()."""
return entry
class PurePathBase:
"""Base class for pure path objects.