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GH-114847: Speed up posixpath.realpath() #114848

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Merged
barneygale merged 23 commits into from
Apr 5, 2024
Merged

GH-114847: Speed up posixpath.realpath() #114848

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0a4f60a
GH-114847: Speed up `posixpath.realpath()`
barneygale Feb 1, 2024
5aa9c51
Tiny tweak
barneygale Feb 1, 2024
b758710
Slightly speed up handling of empty/dot parts
barneygale Feb 1, 2024
eb079b4
Merge branch 'main' into gh-114847
barneygale Mar 31, 2024
60d3bcb
Simplify '..' handling.
barneygale Mar 31, 2024
b849308
A few more perf improvements and simplifications.
barneygale Mar 31, 2024
085e105
Simplify symlink resolution signalling
barneygale Mar 31, 2024
69dabd2
Tiny tweaks
barneygale Mar 31, 2024
197c871
Spacing
barneygale Mar 31, 2024
b03e474
Merge branch 'main' into gh-114847
barneygale Apr 1, 2024
ecd1fe7
Comments
barneygale Apr 1, 2024
4b83c97
Final tweaks
barneygale Apr 1, 2024
77712d2
Further explain 'rest'.
barneygale Apr 1, 2024
15199a8
Update Lib/posixpath.py
barneygale Apr 2, 2024
8b3b808
Merge branch 'main' into gh-114847
barneygale Apr 2, 2024
01127e3
Merge branch 'main' into gh-114847
barneygale Apr 3, 2024
31955ee
Undo re-ordering of lstat() and seen lookup
barneygale Apr 3, 2024
211167e
Merge branch 'main' into gh-114847
barneygale Apr 3, 2024
fe62fef
Re-optimise link check
barneygale Apr 4, 2024
ebccd2b
Stop querying when `lstat()` fails.
barneygale Apr 4, 2024
d2a0248
Keep querying if we hit an OSError from lstat()
barneygale Apr 4, 2024
ecbb27c
Merge branch 'main' into gh-114847
barneygale Apr 4, 2024
eed739a
Update Lib/posixpath.py
barneygale Apr 5, 2024
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Further explain 'rest'.
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@barneygale
barneygale committed Apr 1, 2024
commit 77712d2fccd83f0f748ea76c77ddd2a8005c7fb5
5 changes: 4 additions & 1 deletion Lib/posixpath.py
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Expand Up @@ -423,7 +423,10 @@ def realpath(filename, *, strict=False):
pardir = '..'
getcwd = os.getcwd

# The stack of unresolved path parts.
# The stack of unresolved path parts. When popped, a special value of None
# indicates that a symlink target has been resolved, and that the original
# symlink path can be retrieved by popping again. The [::-1] slice is a
# very fast way of spelling list(reversed(...)).
rest = filename.split(sep)[::-1]
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# The resolved path, which is absolute throughout this function.
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