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Title: Issue 28637: Python startup performance regression - Python tracker

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This issue has been migrated to GitHub: https://github.com/python/cpython/issues/72823 https://github.com/python/cpython/issues/72823
Titlehttp://docs.python.org/devguide/triaging.html#title
Typehttp://docs.python.org/devguide/triaging.html#type
Stagehttp://docs.python.org/devguide/triaging.html#stage
Componentshttp://docs.python.org/devguide/triaging.html#components
Versionshttp://docs.python.org/devguide/triaging.html#versions
Statushttp://docs.python.org/devguide/triaging.html#status
Resolutionhttp://docs.python.org/devguide/triaging.html#resolution
Dependencieshttp://docs.python.org/devguide/triaging.html#dependencies
Supersederhttp://docs.python.org/devguide/triaging.html#superseder
Assigned Tohttp://docs.python.org/devguide/triaging.html#assigned-to
Nosy Listhttp://docs.python.org/devguide/triaging.html#nosy-list
Priorityhttp://docs.python.org/devguide/triaging.html#priority
Keywordshttp://docs.python.org/devguide/triaging.html#keywords
site-not-use-re.patchhttps://bugs.python.org/file45389/site-not-use-re.patch
reviewhttps://bugs.python.org/review/28637/#ps19093
no_use_re_in_site_py.patchhttps://bugs.python.org/file45390/no_use_re_in_site_py.patch
reviewhttps://bugs.python.org/review/28637/#ps19094
site-not-use-re.patchhttps://bugs.python.org/file45391/site-not-use-re.patch
reviewhttps://bugs.python.org/review/28637/#ps19095
msg280256https://bugs.python.org/issue28637#msg280256
(view)https://bugs.python.org/msg280256
223731925d06https://hg.python.org/lookup/223731925d06
#28082https://bugs.python.org/issue28082
5637c9b4dd4chttps://hg.python.org/lookup/5637c9b4dd4c
223731925d06https://hg.python.org/lookup/223731925d06
Lib/re.pyhttps://github.com/python/cpython/blob/master/Lib/re.py
223731925d06https://hg.python.org/lookup/223731925d06
#28082https://bugs.python.org/issue28082
msg280258https://bugs.python.org/issue28637#msg280258
(view)https://bugs.python.org/msg280258
msg280259https://bugs.python.org/issue28637#msg280259
(view)https://bugs.python.org/msg280259
msg280260https://bugs.python.org/issue28637#msg280260
(view)https://bugs.python.org/msg280260
https://speed.python.org/timeline/#/?exe=4&ben=python_startup&env=1&revs=50&equid=off&quarts=on&extr=onhttps://speed.python.org/timeline/#/?exe=4&ben=python_startup&env=1&revs=50&equid=off&quarts=on&extr=on
https://github.com/python/performancehttps://github.com/python/performance
msg280261https://bugs.python.org/issue28637#msg280261
(view)https://bugs.python.org/msg280261
msg280262https://bugs.python.org/issue28637#msg280262
(view)https://bugs.python.org/msg280262
d903a243c281https://hg.python.org/lookup/d903a243c281
#28637https://bugs.python.org/issue28637
#28082https://bugs.python.org/issue28082
https://hg.python.org/cpython/rev/d903a243c281https://hg.python.org/cpython/rev/d903a243c281
msg280266https://bugs.python.org/issue28637#msg280266
(view)https://bugs.python.org/msg280266
msg280267https://bugs.python.org/issue28637#msg280267
(view)https://bugs.python.org/msg280267
msg280268https://bugs.python.org/issue28637#msg280268
(view)https://bugs.python.org/msg280268
msg280269https://bugs.python.org/issue28637#msg280269
(view)https://bugs.python.org/msg280269
msg280271https://bugs.python.org/issue28637#msg280271
(view)https://bugs.python.org/msg280271
d903a243c281https://hg.python.org/lookup/d903a243c281
573bc1f9900ehttps://hg.python.org/lookup/573bc1f9900e
cf7711887b4ahttps://hg.python.org/lookup/cf7711887b4a
573bc1f9900ehttps://hg.python.org/lookup/573bc1f9900e
cf7711887b4ahttps://hg.python.org/lookup/cf7711887b4a
88110cfbf4dchttps://hg.python.org/lookup/88110cfbf4dc
#28193https://bugs.python.org/issue28193
88110cfbf4dchttps://hg.python.org/lookup/88110cfbf4dc
msg280272https://bugs.python.org/issue28637#msg280272
(view)https://bugs.python.org/msg280272
msg280273https://bugs.python.org/issue28637#msg280273
(view)https://bugs.python.org/msg280273
c4319c0d0131https://hg.python.org/lookup/c4319c0d0131
36af3566b67ahttps://hg.python.org/lookup/36af3566b67a
cf7711887b4ahttps://hg.python.org/lookup/cf7711887b4a
msg280274https://bugs.python.org/issue28637#msg280274
(view)https://bugs.python.org/msg280274
c4319c0d0131https://hg.python.org/lookup/c4319c0d0131
36af3566b67ahttps://hg.python.org/lookup/36af3566b67a
cf7711887b4ahttps://hg.python.org/lookup/cf7711887b4a
http://bugs.python.org/issue28637http://bugs.python.org/issue28637
msg280296https://bugs.python.org/issue28637#msg280296
(view)https://bugs.python.org/msg280296
Issue 25185https://bugs.python.org/issue25185
msg280301https://bugs.python.org/issue28637#msg280301
(view)https://bugs.python.org/msg280301
msg280302https://bugs.python.org/issue28637#msg280302
(view)https://bugs.python.org/msg280302
Lib/collections/__init__.pyhttps://github.com/python/cpython/blob/master/Lib/collections/__init__.py
msg280304https://bugs.python.org/issue28637#msg280304
(view)https://bugs.python.org/msg280304
issue28638https://bugs.python.org/issue28638
msg280305https://bugs.python.org/issue28637#msg280305
(view)https://bugs.python.org/msg280305
msg280306https://bugs.python.org/issue28637#msg280306
(view)https://bugs.python.org/msg280306
msg280312https://bugs.python.org/issue28637#msg280312
(view)https://bugs.python.org/msg280312
msg280328https://bugs.python.org/issue28637#msg280328
(view)https://bugs.python.org/msg280328
a822818ec74ehttps://hg.python.org/lookup/a822818ec74e
#28637https://bugs.python.org/issue28637
https://hg.python.org/cpython/rev/a822818ec74ehttps://hg.python.org/cpython/rev/a822818ec74e
a4ea837a7f84https://hg.python.org/lookup/a4ea837a7f84
#28637https://bugs.python.org/issue28637
https://hg.python.org/cpython/rev/a4ea837a7f84https://hg.python.org/cpython/rev/a4ea837a7f84
msg280346https://bugs.python.org/issue28637#msg280346
(view)https://bugs.python.org/msg280346
msg280353https://bugs.python.org/issue28637#msg280353
(view)https://bugs.python.org/msg280353
https://github.com/python/performance/blob/master/performance/benchmarks/bm_python_startup.pyhttps://github.com/python/performance/blob/master/performance/benchmarks/bm_python_startup.py
msg280362https://bugs.python.org/issue28637#msg280362
(view)https://bugs.python.org/msg280362
msg280370https://bugs.python.org/issue28637#msg280370
(view)https://bugs.python.org/msg280370
msg280378https://bugs.python.org/issue28637#msg280378
(view)https://bugs.python.org/msg280378
issue28082https://bugs.python.org/issue28082
msg280380https://bugs.python.org/issue28637#msg280380
(view)https://bugs.python.org/msg280380
msg280383https://bugs.python.org/issue28637#msg280383
(view)https://bugs.python.org/msg280383
msg280271https://bugs.python.org/msg280271
88110cfbf4dchttps://hg.python.org/lookup/88110cfbf4dc
#28193https://bugs.python.org/issue28193
msg280409https://bugs.python.org/issue28637#msg280409
(view)https://bugs.python.org/msg280409
msg280552https://bugs.python.org/issue28637#msg280552
(view)https://bugs.python.org/msg280552
8ebaa546a033https://hg.python.org/lookup/8ebaa546a033
dfeadfb4c8cchttps://hg.python.org/lookup/dfeadfb4c8cc
https://speed.python.org/timeline/#/?exe=4&ben=python_startup&env=1&revs=50&equid=off&quarts=on&extr=onhttps://speed.python.org/timeline/#/?exe=4&ben=python_startup&env=1&revs=50&equid=off&quarts=on&extr=on
Lib/site.pyhttps://github.com/python/cpython/blob/master/Lib/site.py
msg280558https://bugs.python.org/issue28637#msg280558
(view)https://bugs.python.org/msg280558
msg280559https://bugs.python.org/issue28637#msg280559
(view)https://bugs.python.org/msg280559
msg280629https://bugs.python.org/issue28637#msg280629
(view)https://bugs.python.org/msg280629
msg280636https://bugs.python.org/issue28637#msg280636
(view)https://bugs.python.org/msg280636
msg280753https://bugs.python.org/issue28637#msg280753
(view)https://bugs.python.org/msg280753
5fd69d4a93e0https://hg.python.org/lookup/5fd69d4a93e0
#28637https://bugs.python.org/issue28637
223731925d06https://hg.python.org/lookup/223731925d06
https://hg.python.org/cpython/rev/5fd69d4a93e0https://hg.python.org/cpython/rev/5fd69d4a93e0
msg280758https://bugs.python.org/issue28637#msg280758
(view)https://bugs.python.org/msg280758
Lib/re.pyhttps://github.com/python/cpython/blob/master/Lib/re.py
msg280760https://bugs.python.org/issue28637#msg280760
(view)https://bugs.python.org/msg280760
gvanrossumhttps://bugs.python.org/user5
christian.heimeshttps://bugs.python.org/user3108
msg280760https://bugs.python.org/msg280760
msg280758https://bugs.python.org/msg280758
msg280753https://bugs.python.org/msg280753
msg280636https://bugs.python.org/msg280636
rhettingerhttps://bugs.python.org/user114
msg280629https://bugs.python.org/msg280629
msg280559https://bugs.python.org/msg280559
msg280558https://bugs.python.org/msg280558
msg280552https://bugs.python.org/msg280552
msg280409https://bugs.python.org/msg280409
msg280383https://bugs.python.org/msg280383
msg280380https://bugs.python.org/msg280380
gregory.p.smithhttps://bugs.python.org/user252
msg280378https://bugs.python.org/msg280378
msg280370https://bugs.python.org/msg280370
msg280362https://bugs.python.org/msg280362
msg280353https://bugs.python.org/msg280353
msg280346https://bugs.python.org/msg280346
msg280328https://bugs.python.org/msg280328
terry.reedyhttps://bugs.python.org/user155
msg280312https://bugs.python.org/msg280312
vinay.sajiphttps://bugs.python.org/user328
msg280306https://bugs.python.org/msg280306
site-not-use-re.patchhttps://bugs.python.org/file45391
no_use_re_in_site_py.patchhttps://bugs.python.org/file45390
msg280305https://bugs.python.org/msg280305
msg280304https://bugs.python.org/msg280304
msg280302https://bugs.python.org/msg280302
site-not-use-re.patchhttps://bugs.python.org/file45389
serhiy.storchakahttps://bugs.python.org/user15623
msg280301https://bugs.python.org/msg280301
patchhttps://bugs.python.org/keyword2
wolmahttps://bugs.python.org/user18315
msg280296https://bugs.python.org/msg280296
msg280274https://bugs.python.org/msg280274
msg280273https://bugs.python.org/msg280273
msg280272https://bugs.python.org/msg280272
msg280271https://bugs.python.org/msg280271
msg280269https://bugs.python.org/msg280269
msg280268https://bugs.python.org/msg280268
msg280267https://bugs.python.org/msg280267
msg280266https://bugs.python.org/msg280266
python-devhttps://bugs.python.org/user13902
msg280262https://bugs.python.org/msg280262
msg280261https://bugs.python.org/msg280261
msg280260https://bugs.python.org/msg280260
msg280259https://bugs.python.org/msg280259
gvanrossumhttps://bugs.python.org/user5
msg280258https://bugs.python.org/msg280258
ned.deilyhttps://bugs.python.org/user5248
The Python Software Foundationhttps://python.org/psf-landing/
Rounduphttp://roundup.sourceforge.net
Python Software Foundationhttp://python.org/psf
Legal Statementshttp://python.org/about/legal
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