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Title: gh-118761: Always lazy import `re` in `locale` by donbarbos · Pull Request #129860 · python/cpython · GitHub

Open Graph Title: gh-118761: Always lazy import `re` in `locale` by donbarbos · Pull Request #129860 · python/cpython

X Title: gh-118761: Always lazy import `re` in `locale` by donbarbos · Pull Request #129860 · python/cpython

Description: Improve import time of locale by lazy import re CPython configure flags: ./configure --enable-optimizations --with-lto --enable-loadable-sqlite-extensions Benchmarks: Running: pipx install tuna && ./python -X importtime -c 'import locale' 2> import.log && tuna import.log Total import time: 0.014s -> 0.009s = x1.56 as fast main branch PR branch locale import time: 0.007s -> 0.003s = x2.34 as fast main branch PR branch hyperfine: 14.9ms -> 12.1ms = x1.23 as fast Main branch: $ hyperfine --warmup 11 --runs 3000 "./python -c 'import locale'" Benchmark 1: ./python -c 'import locale' Time (mean ± σ): 14.9 ms ± 0.5 ms [User: 12.8 ms, System: 2.1 ms] Range (min … max): 14.4 ms … 25.3 ms 3000 runs PR branch: $ hyperfine --warmup 11 --runs 3000 "./python -c 'import locale'" Benchmark 1: ./python -c 'import locale' Time (mean ± σ): 12.1 ms ± 0.5 ms [User: 10.0 ms, System: 2.1 ms] Range (min … max): 11.6 ms … 21.6 ms 3000 runs Issue: gh-118761

Open Graph Description: Improve import time of locale by lazy import re CPython configure flags: ./configure --enable-optimizations --with-lto --enable-loadable-sqlite-extensions Benchmarks: Running: pipx install tuna &am...

X Description: Improve import time of locale by lazy import re CPython configure flags: ./configure --enable-optimizations --with-lto --enable-loadable-sqlite-extensions Benchmarks: Running: pipx install tuna &am...

Opengraph URL: https://github.com/python/cpython/pull/129860

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f2366f8 Always lazy import re in locale donbarbos Feb 8, 2025 https://github.com/python/cpython/pull/129860/commits/f2366f8cbfc0d0d90b45bd2815f2503c644ff536
bca1380 Back performance to re donbarbos Feb 9, 2025 https://github.com/python/cpython/pull/129860/commits/bca13804703451b715cfb5c5b0710ee8d0822f53
5e08b48 Fix bug donbarbos Feb 9, 2025 https://github.com/python/cpython/pull/129860/commits/5e08b48d22cca84f4d7b30d5d90a3237b1ba2400
b52596c Merge branch 'main' into lazy-locale-re donbarbos Feb 9, 2025 https://github.com/python/cpython/pull/129860/commits/b52596cdb9808110c2b2f6304021e1f1d9cbdece
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