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Move compiled regular expressions in platform.py into cached methods #103977

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eendebakpt opened this issue Apr 28, 2023 · 1 comment
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Move compiled regular expressions in platform.py into cached methods #103977

eendebakpt opened this issue Apr 28, 2023 · 1 comment
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type-bug An unexpected behavior, bug, or error

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@eendebakpt
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eendebakpt commented Apr 28, 2023 •
edited by bedevere-bot
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In platform.py there are several regular expressions compiled during import that might not be used at all. The regular expressions are only called once at most, since they are called from without cached metods. We can eliminate the cost of compilation by moving the regular expressions into the methods.

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@eendebakpt eendebakpt added the type-bug An unexpected behavior, bug, or error label Apr 28, 2023
@bedevere-bot bedevere-bot mentioned this issue Apr 28, 2023
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JelleZijlstra added a commit that referenced this issue Apr 30, 2023
@eendebakpt @JelleZijlstra
gh-103977: compile re expressions in platform.py only if required (#1…
f186557 
…03981)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
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Thanks for the PR!

carljm added a commit to carljm/cpython that referenced this issue May 1, 2023
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Merge branch 'main' into supermon
159b2aa 
* main: (26 commits)
  pythongh-104028: Reduce object creation while calling callback function from gc (pythongh-104030)
  pythongh-104036: Fix direct invocation of test_typing (python#104037)
  pythongh-102213: Optimize the performance of `__getattr__` (pythonGH-103761)
  pythongh-103895: Improve how invalid `Exception.__notes__` are displayed (python#103897)
  Adjust expression from `==` to `!=` in alignment with the meaning of the paragraph. (pythonGH-104021)
  pythongh-88496: Fix IDLE test hang on macOS (python#104025)
  Improve int test coverage (python#104024)
  pythongh-88773: Added teleport method to Turtle library (python#103974)
  pythongh-104015: Fix direct invocation of `test_dataclasses` (python#104017)
  pythongh-104012: Ensure test_calendar.CalendarTestCase.test_deprecation_warning consistently passes (python#104014)
  pythongh-103977: compile re expressions in platform.py only if required (python#103981)
  pythongh-98003: Inline call frames for CALL_FUNCTION_EX (pythonGH-98004)
  Replace Netlify with Read the Docs build previews (python#103843)
  Update name in acknowledgements and add mailmap (python#103696)
  pythongh-82054: allow test runner to split test_asyncio to execute in parallel by sharding. (python#103927)
  Remove non-existing tools from Sundry skiplist (python#103991)
  pythongh-103793: Defer formatting task name (python#103767)
  pythongh-87092: change assembler to use instruction sequence instead of CFG (python#103933)
  pythongh-103636: issue warning for deprecated calendar constants (python#103833)
  Various small fixes to dis docs (python#103923)
  ...
@jiridanek jiridanek mentioned this issue Jan 2, 2024
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