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GH-125413: pathlib ABCs: use scandir() to speed up walk() (#126262)

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

There are no user-facing changes, because the pathlib ABCs are still
private and `Path.walk()` doesn't use the implementation in its superclass.
This commit is contained in:
Barney Gale 2024-11-01 18:52:00 +00:00 • committed by GitHub
parent 68a51e0178
commit 37651cfbce
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2 changed files with 14 additions and 12 deletions
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22
Lib/pathlib/_abc.py
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@ -693,16 +693,18 @@ class PathBase(PurePathBase):
if not top_down:
paths.append((path, dirnames, filenames))
try:
for child in path.iterdir():
try:
if child.is_dir(follow_symlinks=follow_symlinks):
if not top_down:
paths.append(child)
dirnames.append(child.name)
else:
filenames.append(child.name)
except OSError:
filenames.append(child.name)
with path.scandir() as entries:
for entry in entries:
name = entry.name
try:
if entry.is_dir(follow_symlinks=follow_symlinks):
if not top_down:
paths.append(path.joinpath(name))
dirnames.append(name)
else:
filenames.append(name)
except OSError:
filenames.append(name)
except OSError as error:
if on_error is not None:
on_error(error)