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Title: gh-118761: Optimise import time for ``shlex`` by AA-Turner · Pull Request #132036 · python/cpython · GitHub

Open Graph Title: gh-118761: Optimise import time for ``shlex`` by AA-Turner · Pull Request #132036 · python/cpython

X Title: gh-118761: Optimise import time for ``shlex`` by AA-Turner · Pull Request #132036 · python/cpython

Description: This PR achieves a 33x improvement in import time for the shlex module and a 4-12x improvement in performance for shlex.quote. Current: import shlex: cumulative time mean: 9065.967 µs median: 9092.000 µs stdev: 282.015 min: 8587 max: 9556 This PR: import shlex: cumulative time mean: 274.300 µs median: 275.000 µs stdev: 8.860 min: 259 max: 289 Issue: gh-118761

Open Graph Description: This PR achieves a 33x improvement in import time for the shlex module and a 4-12x improvement in performance for shlex.quote. Current: import shlex: cumulative time mean: 9065.967 µs median: 9092....

X Description: This PR achieves a 33x improvement in import time for the shlex module and a 4-12x improvement in performance for shlex.quote. Current: import shlex: cumulative time mean: 9065.967 µs median: 9092....

Opengraph URL: https://github.com/python/cpython/pull/132036

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1fd83f1 Optimise import time for ``shlex`` AA-Turner Apr 2, 2025 https://github.com/python/cpython/pull/132036/commits/1fd83f134473efe04b390b7038fec9bc01d5940f
8811463 Revert deferral of sys and io AA-Turner Apr 4, 2025 https://github.com/python/cpython/pull/132036/commits/8811463aed98455641958e4a64cf7ba242ac283e
bd6916a Switch to bytes.translate() based approach AA-Turner Apr 6, 2025 https://github.com/python/cpython/pull/132036/commits/bd6916a9d45e68ce9f5de60f79cb0d9e049eb61d
192329e Update Lib/shlex.py AA-Turner Apr 18, 2025 https://github.com/python/cpython/pull/132036/commits/192329ea333c1e19e5ef251161afe4f221217a78
cc130af Merge branch 'main' into opt-shlex AA-Turner Apr 18, 2025 https://github.com/python/cpython/pull/132036/commits/cc130affb1baf4f6ee037767ba145b3a7b2af301
4a640ce Add test_lazy_imports AA-Turner Apr 21, 2025 https://github.com/python/cpython/pull/132036/commits/4a640ce2f34753d8c0c55f3cecdaa1f406f3dd00
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