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GH-101362: Check pathlib.Path flavour compatibility at import time #101664

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barneygale
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@barneygale barneygale commented Feb 7, 2023

This saves a comparison in pathlib.Path.__new__() and reduces the time taken to run Path() by ~5%.

Automerge-Triggered-By: GH:AlexWaygood

This saves a comparison in `pathlib.Path.__new__()` and reduces the time
taken to run `Path()` by ~5%
@AlexWaygood
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Very cool idea!

@AlexWaygood AlexWaygood added the performance Performance or resource usage label Mar 5, 2023
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Tiny nit: since we're touching these lines anyway, I'd prefer to modernise the code slightly by using f-strings

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Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
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LGTM!

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Status check is done, and it's a success ✅.

@miss-islington miss-islington merged commit 3e60e02 into python:main Mar 5, 2023
hugovk pushed a commit to hugovk/cpython that referenced this pull request Mar 6, 2023
…ime (pythonGH-101664)

This saves a comparison in `pathlib.Path.__new__()` and reduces the time taken to run `Path()` by ~5%.

Automerge-Triggered-By: GH:AlexWaygood
carljm added a commit to carljm/cpython that referenced this pull request Mar 6, 2023
* main: (21 commits)
  pythongh-102192: Replace PyErr_Fetch/Restore etc by more efficient alternatives in sub interpreters module (python#102472)
  pythongh-95672: Fix versionadded indentation of get_pagesize in test.rst (pythongh-102455)
  pythongh-102416: Do not memoize incorrectly loop rules in the parser (python#102467)
  pythonGH-101362: Optimise PurePath(PurePath(...)) (pythonGH-101667)
  pythonGH-101362: Check pathlib.Path flavour compatibility at import time (pythonGH-101664)
  pythonGH-101362: Call join() only when >1 argument supplied to pathlib.PurePath() (python#101665)
  pythongh-102444: Fix minor bugs in `test_typing` highlighted by pyflakes (python#102445)
  pythonGH-102341: Improve the test function for pow (python#102342)
  Fix unused classes in a typing test (pythonGH-102437)
  pythongh-101979: argparse: fix a bug where parentheses in metavar argument of add_argument() were dropped (python#102318)
  pythongh-102356: Add thrashcan macros to filter object dealloc (python#102426)
  Move around example in to_bytes() to avoid confusion (python#101595)
  pythonGH-97546: fix flaky asyncio `test_wait_for_race_condition` test (python#102421)
  pythongh-96821: Add config option `--with-strict-overflow` (python#96823)
  pythongh-101992: update pstlib module documentation (python#102133)
  pythongh-63301: Set exit code when tabnanny CLI exits on error (python#7699)
  pythongh-101863: Fix wrong comments in EUC-KR codec (pythongh-102417)
  pythongh-102302 Micro-optimize `inspect.Parameter.__hash__` (python#102303)
  pythongh-102179: Fix `os.dup2` error reporting for negative fds (python#102180)
  pythongh-101892: Fix `SystemError` when a callable iterator call exhausts the iterator (python#101896)
  ...
carljm added a commit to carljm/cpython that referenced this pull request Mar 7, 2023
* main: (37 commits)
  pythongh-102192: Replace PyErr_Fetch/Restore etc by more efficient alternatives in sub interpreters module (python#102472)
  pythongh-95672: Fix versionadded indentation of get_pagesize in test.rst (pythongh-102455)
  pythongh-102416: Do not memoize incorrectly loop rules in the parser (python#102467)
  pythonGH-101362: Optimise PurePath(PurePath(...)) (pythonGH-101667)
  pythonGH-101362: Check pathlib.Path flavour compatibility at import time (pythonGH-101664)
  pythonGH-101362: Call join() only when >1 argument supplied to pathlib.PurePath() (python#101665)
  pythongh-102444: Fix minor bugs in `test_typing` highlighted by pyflakes (python#102445)
  pythonGH-102341: Improve the test function for pow (python#102342)
  Fix unused classes in a typing test (pythonGH-102437)
  pythongh-101979: argparse: fix a bug where parentheses in metavar argument of add_argument() were dropped (python#102318)
  pythongh-102356: Add thrashcan macros to filter object dealloc (python#102426)
  Move around example in to_bytes() to avoid confusion (python#101595)
  pythonGH-97546: fix flaky asyncio `test_wait_for_race_condition` test (python#102421)
  pythongh-96821: Add config option `--with-strict-overflow` (python#96823)
  pythongh-101992: update pstlib module documentation (python#102133)
  pythongh-63301: Set exit code when tabnanny CLI exits on error (python#7699)
  pythongh-101863: Fix wrong comments in EUC-KR codec (pythongh-102417)
  pythongh-102302 Micro-optimize `inspect.Parameter.__hash__` (python#102303)
  pythongh-102179: Fix `os.dup2` error reporting for negative fds (python#102180)
  pythongh-101892: Fix `SystemError` when a callable iterator call exhausts the iterator (python#101896)
  ...
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4 participants