Why is Python 3.7 fastest

PyCon Korea 2019 ౵੉ॆ 3.7 যଧ Ӓۧѱ ࡈۄ઎ա ੿ѹ਎

!2 ডр જইೡ ࢎۈ݅ જইೡ ઱ઁ ߊ಴ ࣗѐ

!3 ੉۠ ઱ઁ۽ ߊ಴ܳ ೞח ੉ਬ ߊ಴ ࣗѐ

!4 ࢜ ߡ੹੉ ܾܻૉؼ ٸ݃׮ ୃѹࠁѱ غח What's New In
Python 3.x ߊ಴ ࣗѐ

!5 3.7 ੉੹ীب performance improvement৬ optimizationী ؀ೠ ೦ݾ਷ ઓ੤ ߊ಴
ࣗѐ

• 3~5ߓ ࡈۄ૓ os.walk() ೣࣻ • bytes(int) ѐࢶ • 10%
ࡈۄ૓ ੿ӏ಴അध ౵य • 25% ࡈۄ૓ property() getter ഐ୹ • ١١ ੗ੜೠ ѐࢶ !6 Python 3.5 Optimizations ߊ಴ ࣗѐ

• C۽ ҳഅೠ asyncio.Future, asyncio.Task • 30ߓ ࡅܲ typing ݽٕ
• ~4ߓ ࡈۄ૓ os.scandir() !7 Python 3.6 Optimizations ߊ಴ ࣗѐ

!8 3.7ীࢶ ௐ ૘য ঱әೠ Optimizations ߊ಴ ࣗѐ

!9 ߊ಴ ࣗѐ

!10 ߊ಴ ࣗѐ

!11 ୊਺ 3.7੉ ܾܻૉغҊ Ӓٺ Ӓր 'য় ࡈۄ઎ҳա જ֎' ߊ಴
ࣗѐ

!12 3ର ௑࢟۞٘ - ߛ௼࢟۞٘ ౵੉ॆݍ ۨदೖ ߊ಴ ߊ಴ ࣗѐ

!13 ߊ಴ ࣗѐ ౵੉ॆ 3.7੉ о੢ ࡅܲ ۠ఋ੐ ߡ੹੉ۄ ࣗѐ

!14 ੉ ٸب Ӓր 'о੢ ࡅܰҳա' ߊ಴ ࣗѐ

!15 ৵ ࡅܲ૑ ࢓ಝࠁ۰Ҋ ೞӟ೮ਵա... ߊ಴ ࣗѐ

!16 ਺ bpo-xxxxx? ੉Ѥ ަө... Issue#2334 ੉۠Ѥ ঌѷחؘ... ߊ಴ ࣗѐ

!17 ই bugs.python.org ۽ ҙܻೞח ੉ग ֈߡ݂੉ҳա ٜযоࠁ੗ ߊ಴ ࣗѐ

!18 ߊ಴ ࣗѐ bpo-29300

!19 ߊ಴ ࣗѐ bpo-29300 ੉ѱ ޤঠ...

!20 ղѱ ੊ࣼೠѤ ੉۠ ചݶੋؘ... ߊ಴ ࣗѐ

!21 PR ߑध੉ ੊ࣼೞ؍ աীѱ ц੗ӝ ࠙ਤӝ patch ߊ಴ ࣗѐ
bpo-29300

!22 ߊ಴ ࣗѐ

!23 ߊ಴ ࣗѐ

!24 ଵҊ۽ 2017֙ 2ਘࠗఠ CPython ѐߊ਷ hgীࢲ GitHubਵ۽ ੉زೣ ੉ग౟ېఊب
GitHub Issueܳ ࢎਊೞ੗ח PEP-581੉ थੋغয ૓೯ ઺ ߊ಴ ࣗѐ

!25 Ӓۧѱ ױ֛ೞҊ ૑ղ؍ ઺ ߊ಴ ࣗѐ

!26 ߊ಴ ࣗѐ

!27 ߊ಴ ࣗѐ Ӓې! աب ݽܰחѦ ߊ಴೧ࠁ੗ Ӓ۞ݶ র૑۽ۄب ׮
ࡸࣿ ࣻ ੓ѷ૑?!

!28 ౵੉௑ ߊ಴ ૑ਗ ই... ߊ಴઱ઁ ߄Եࣻ ੓ח૑ ޛযࠅө... ߊ಴
ࣗѐ

• ੷ب C ੜ ݽܵפ׮ • ࢜܂ѱ ୶оػ OPCODE੄ ࣁࠗ
ҳഅҗ line by line ೧ࢳ • 2,000઴੉ ֈח re-implement in C PR ܻ࠭ೞӝ • ੿ӏ ಴അध ౵ࢲ ৮੹ ੿ࠂ !29 য়ט ݈ೞ૑ ঋਸ ղਊ ߊ಴ ࣗѐ

• ࢿמ ѐࢶਸ ਤ೧ যڃ ই੉٣যо ੓঻ա • ؊ ঌҊर׮ݶ
য٣ܳ ࠁݶ ؼ૑ • Ӓېب ৮੹ য۵૑݅਷ ঋ਷ C ௏٘ !30 য়ט ݈ೡ ղਊ ߊ಴ ࣗѐ

!31 ੿ѹ਎ Jung Winter ߛ௼࢟۞٘ ߔূ٘ ূ૑פয res_tin JungWinter ߊ಴੗

!32 Index 01 ӝࠄ ݫࢲ٘ ഐ୹ 02 ౵੉ॆ द੘ दр
03 ੋझఢझ ݫࢲ٘ ഐ୹ 04 asyncio.sleep 05 ੉߮౟ ܖ೐ оઉয়ӝ 06 زदী प೯ೞӝ 07 asyncio.ensure_future 08 typing ݽٕ оઉয়ӝ 09 ܻझ౟ ੿۳ 10 ٤࣊ցܻ ࠂࢎ 11 ੿ӏ಴അध __enter__() __exit__()

01 ӝࠄ ݫࢲ٘ ഐ୹

!34 The overhead of calling many methods of various standard
library classes implemented in C has been signiﬁcantly reduced by porting more code to use the METH_FASTCALL convention. bpo-29300 bpo-29507 bpo-29452 bpo-29286 01 ӝࠄ ݫࢲ٘ ഐ୹

• ಴ળ ۄ੉࠳۞ܻী ࣘೠ ௿ېझী ੓ח ৈ۞ ݫࢲٜ٘ਸ ୭੸ച೮׮. •
METH_FASTCALL ஶ߮࣌ਸ ٮܰب۾ ߄Ծ׮. !35 ੉ ѐࢶ੄ ઱ ղਊ 01 ӝࠄ ݫࢲ٘ ഐ୹

METH_FASTCALL ஶ߮࣌ਸ ٮܰب۾ ߄Ծ׮. !36 ੉ ѐࢶ੄ ઱ ղਊ collections.deque੄ index(), insert(), rotate() 01 ӝࠄ ݫࢲ٘ ഐ୹

METH_FASTCALL ஶ߮࣌ਸ ٮܰب۾ ߄Ծ׮. !37 ੉ ѐࢶ੄ ઱ ղਊ collections.deque੄ index(), insert(), rotate() __getitem__() 01 ӝࠄ ݫࢲ٘ ഐ୹

METH_FASTCALL ஶ߮࣌ਸ ٮܰب۾ ߄Ծ׮. !38 ੉ ѐࢶ੄ ઱ ղਊ collections.deque੄ index(), insert(), rotate() __getitem__() str੄ replace(), ljust(), rjust(), strip(), upper() ١ 01 ӝࠄ ݫࢲ٘ ഐ୹

!39 METH_FASTCALL੉ ޤӡې 01 ӝࠄ ݫࢲ٘ ഐ୹

• ࢤӟѤ opcode୊ۢ ࢤ҂૑݅ ࢎप C ೣࣻ ࢶ঱ ஶ߮࣌ •
METH_FASTCALL ஶ߮࣌ী ݏ୾ ೣࣻܳ ࢶ঱ೞݶ ࢿמ࢚ ੉ٙ੉ ੓਺ • ӝઓূ METH_VARARGS ஶ߮࣌ ࢎਊ • ౵੉ॆ tuple → PyObject੄ C ߓৌ !40 METH_FASTCALL 01 ӝࠄ ݫࢲ٘ ഐ୹

• ࢤӟѤ opcode୊ۢ ࢤ҂૑݅ ࢎप C ೣࣻ ࢶ঱ ஶ߮࣌ •
METH_FASTCALL ஶ߮࣌ী ݏ୾ ೣࣻܳ ࢶ঱ೞݶ ࢿמ࢚ ੉ٙ੉ ੓਺ • ӝઓূ METH_VARARGS ஶ߮࣌ ࢎਊ • ౵੉ॆ tuple → PyObject੄ C ߓৌ !41 METH_FASTCALL 01 ӝࠄ ݫࢲ٘ ഐ୹ ؊ Өѱ ঌҊर׮ݶ bpo-27810, ҙ۲ mailing list

!42 01 ӝࠄ ݫࢲ٘ ഐ୹ Python/C API Reference Manual: Common
Object Structures

!43 Python 3.8ী ୶оػ positional arguments ѐ֛ METH_FASTCALL਷ ࡅܲ؀न keyword
arguments ॶ ࣻ হ਺ 01 ӝࠄ ݫࢲ٘ ഐ୹ Python/C API Reference Manual: Common Object Structures

!44 01 ӝࠄ ݫࢲ٘ ഐ୹ GitHub - ipython

!45 01 ӝࠄ ݫࢲ٘ ഐ୹ Review: Use FASTCALL for collections.deque
methods: index, insert, rotate ੉۠धਵ۽ ೣࣻ੄ दӒפ୛৬ ౵य۽૒੉ ߄Պ

• ೣࣻ ߸ജҗ ࢤࢿਸ ب৬઱ח بҳ • CPython ղ੢ ೣࣻ
ੋࣻ ୊ܻܳ ذח DSL • PEP-436җ how to clinic ޙࢲ !46 Argument Clinic 01 ӝࠄ ݫࢲ٘ ഐ୹

• ೣࣻ ߸ജҗ ࢤࢿਸ ب৬઱ח بҳ • CPython ղ੢ ೣࣻ
ੋࣻ ୊ܻܳ ذח DSL • PEP-436җ how to clinic ޙࢲ !47 Argument Clinic 01 ӝࠄ ݫࢲ٘ ഐ୹

!48 ׮নೠ ݫࢲٜ٘੉ ~30% ੿ب ࡈۄ૗ 01 ӝࠄ ݫࢲ٘ ഐ୹

02 ౵੉ॆ द੘ दр

!50 Various optimizations have reduced Python startup time by 10%
on Linux and up to 30% on macOS. bpo-31333: Implement ABCMeta in C bpo-29585: site.py imports relatively large `sysconﬁg` module 02 ౵੉ॆ द੘ दр

• abcݽٕਸ C۽ ׮द ૧׮. • site.pyо ࢎਊೞח sysconfig.py੄ ౠ੿
ೣࣻܳ import ೞ૑ ঋҊ ࠂࢎ೧ࢲ ࢎਊೞ ب۾ ߄Ծ׮. • ؒਵ۽ isinstance৬ issubclassب 1.5ߓ ࡈۄ઎׮. !51 ੉ ѐࢶ੄ ઱ ղਊ 02 ౵੉ॆ द੘ दр

!52 C۽ ׮द ૠ abc ݽٕ 02 ౵੉ॆ द੘ दр

!53 02 ౵੉ॆ द੘ दр ղਊ਷ Ӓր abc ݽٕਸ C۽
૧׮. ؊ ঌҊ र׮ݶ #5273 PR

!54 02 ౵੉ॆ द੘ दр ೠ ׳р

!55 02 ౵੉ॆ द੘ दр ೠ ׳р

!56 02 ౵੉ॆ द੘ दр ೠ ׳р ড 300ѐ੄ ܻ࠭

!57 02 ౵੉ॆ द੘ दр ೠ ׳р ড 300ѐ੄ ܻ࠭
2,000઴੉ ֈח ߸҃

!58 ૑ࣘ оמೠ ਬ૑ࠁࣻܳ ୶ҳೞח ݽण 02 ౵੉ॆ द੘ दр

!59 site.pyীࢲ sysconfig import ઁѢ 02 ౵੉ॆ द੘ दр

• site ݽٕ਷ ੋఠ೐ܻఠܳ प೯ೡ ٸ ੗زਵ۽ import غח ݽٕ.
site-package੄ ҃ ۽ܳ ଺Ҋ ୶оೣ • ࢎਊೞ۰ח sysconfig੄ ೣࣻܳ site.py۽ оઉ১ • ׼ো൤ աয়ח ਬ૑ࠁࣻ ਋۰. ف ݽٕ ࢎ੉੄ ঐޗ੸ੋ ҙ҅ • ׮݅ ݽٕਸ C۽ ׮द ੘ࢿೞѢա য়ېغҊ ௾ ݽٕীࢲ ೙ਃೠ ࠗ࠙݅ ܻ࠙ೞח Ѥ ց ޖ ௾ ੘স੉޲۽ ٯ ೙ਃೠ ࠗ࠙݅ оઉয়Ҋ ਬ૑ࠁࣻܳ ਤೠ ઱ࢳਸ ׮ח Ѫਵ۽ ೤੄ • ֿܻझীࢶ 5% ࡈۄ઎Ҋ macOSীࢶ 30% ࡈۄ૗ 02 ౵੉ॆ द੘ दр

!61 02 ౵੉ॆ द੘ दр

03 ੋझఢझ ݫࢲ٘ ഐ୹

!63 Method calls are now up to 20% faster due
to the bytecode changes which avoid creating bound method instances. bpo-26110: Speedup method calls 1.2x 03 ੋझఢझ ݫࢲ٘ ഐ୹

• positional arguments ೣࣻ ഐ୹ী ؀ೠ ࢜۽਍ opcode 2ѐ ୶о
• LOAD_METHOD, CALL_METHOD • ӝઓ opcodeܳ ߄Լب ع૑݅ ੉ۡ҃਋ ݆਷ ࠗ࠙ীࢲ য়൤۰ ࢿמ ೞۅ !64 ੉ ѐࢶ੄ ઱ ղਊ 03 ੋझఢझ ݫࢲ٘ ഐ୹

• positional arguments ೣࣻ ഐ୹ী ؀ೠ ࢜۽਍ opcode 2ѐ ୶о
• LOAD_METHOD, CALL_METHOD • ӝઓ opcodeܳ ߄Լب ع૑݅ ੉ۡ҃਋ ݆਷ ࠗ࠙ীࢲ য়൤۰ ࢿמ ೞۅ !65 ੉ ѐࢶ੄ ઱ ղਊ 03 ੋझఢझ ݫࢲ٘ ഐ୹ ؊ ঌҊ र׮ݶ bpo-26110: Patch Set

!66 TMI 03 ੋझఢझ ݫࢲ٘ ഐ୹ ӈب ߈ ۽ࢻ੉ Ӓزউ
s.startswith('abc')੉ s[:3] == 'abc' ࠁ׮ ו۷׮ݶࢲ ই੉٣যܳ જইೣ ই૒ ੸ਊغ૓ ঋই ৈ੹൤ s[:3] == 'abc'о ؊ ࡅܰ૑݅ ա઺ী ੸ਊ оמ

04 asyncio.sleep

!68 ਫ਼द एযоח दр рױೠ ই੉٣য۽ ࢿמ ೱ࢚ਸ ੉ܞմ PRب
੓਺ 04 asyncio.sleep

!69 asyncio.sleep() is now up to 2 times faster when
the delay argument is zero or negative. bpo-32351: Use fastpath in asyncio.sleep if delay<0 04 asyncio.sleep

asyncio.sleepਵ۽ ֈযৡ delayо ਺ࣻݶ Futureب উٜ݅Ҋ loopী झாે݂ب ೞ૑ঋب۾ ߄Պ
!70 ੉ ѐࢶ੄ ઱ ղਊ 04 asyncio.sleep #4908 PR

!71 04 asyncio.sleep

!72 04 asyncio.sleep ܖ೐ оઉ৬ Future ݅٘ח җ੿

!73 04 asyncio.sleep ܖ೐ী झாે݂ ೞח җ੿

!74 ׼ੌզ ઁউغҊ ׼ੌզ PRৢۄ৬ 2दр ݅ী ݠ૑ؽ 04 asyncio.sleep

05 ੉߮౟ ܖ೐ оઉয়ӝ

!76 The asyncio.get_event_loop() function has been reimplemented in C to
make it up to 15 times faster. bpo-32296: Implement asyncio._get_running_loop() and get_event_loop() in C 05 ੉߮౟ ܖ೐ оઉয়ӝ

• asyncio.get_event_loop, get_running_loop ೣࣻܳ C۽ ૞ࢲ 4ߓ ࡅܰѱ ݅ٝ •
get_running_loopܳ ژ ѐࢶ೧ࢲ 4ߓ ࡅܰѱ ݅ٝ • நय ࢎਊ • os.getpid()؀न getpid() ܳ ࢎਊೞب۾ ѐࢶೣ !77 ੉ ѐࢶ੄ ઱ ղਊ 05 ੉߮౟ ܖ೐ оઉয়ӝ

• asyncio.get_event_loop, get_running_loop ೣࣻܳ C۽ ૞ࢲ 4ߓ ࡅܰѱ ݅ٝ •
get_running_loopܳ ژ ѐࢶ೧ࢲ 4ߓ ࡅܰѱ ݅ٝ • நय ࢎਊ • os.getpid()؀न getpid() ܳ ࢎਊೞب۾ ѐࢶೣ !78 ੉ ѐࢶ੄ ઱ ղਊ ࢿמ ೱ࢚੄ 80% ਃੋ 05 ੉߮౟ ܖ೐ оઉয়ӝ

!79 C۽ ׮द ૠ get_event_loop 05 ੉߮౟ ܖ೐ оઉয়ӝ

!80 05 ੉߮౟ ܖ೐ оઉয়ӝ #4827 PR: Python - get_event_loop
੉ۧѱ рױೠ ౵੉ॆ ௏٘ب

!81 05 ੉߮౟ ܖ೐ оઉয়ӝ #4827 PR: C - get_event_loop
C۽ ૠ׮ݶ ੉ۧѱ ੢ട೧૓׮

!82 05 ੉߮౟ ܖ೐ оઉয়ӝ

!83 ѐࢶػ getpid() 05 ੉߮౟ ܖ೐ оઉয়ӝ

!84 05 ੉߮౟ ܖ೐ оઉয়ӝ #5277 PR

!85 05 ੉߮౟ ܖ೐ оઉয়ӝ #5277 PR ౵੉ॆ੄ os.getpid()ܳ ഐ୹ೞҊ

!86 05 ੉߮౟ ܖ೐ оઉয়ӝ #5277 PR ఋੑਸ ࠺Ү

!87 05 ੉߮౟ ܖ೐ оઉয়ӝ #5277 PR

• ӝઓীח ࡅܰѱ ॳҊ र׮ݶ uvloopо ୭ࢶ • ੉ ߸҃
ࢎ೦ਵ۽ uvloop۽ب ࣘبо ࡈۄ૕ ࣻ হ঻؍ ࠗ࠙ਸ ѐࢶೣ • uvloopח event loop policyܳ ా೧ ੉߮౟ ܖ೐ ੗୓ী ؀ೠ ࠗ࠙ਸ ѐࢶೞӝ ٸޙ • അ੤ ੉߮౟ ܖ೐ܳ оઉয়Ҋ ߈ജೞחѤ API۽ ઁҕೞ૑ ঋওӝী Ѥܾ٘ ࣻ হ਺ 05 ੉߮౟ ܖ೐ оઉয়ӝ

!89 05 ੉߮౟ ܖ೐ оઉয়ӝ uvloopо ѐࢶೡ ࣻ ੓ח ৔৉

06 زदী प೯ೞӝ

!91 async ҙ۲ ѐࢶ਷ খਵ۽ ૣ਷Ѣ ೞա݅ ؊ թওणפ׮! 06
زदী प೯ೞӝ

!92 asyncio.gather() is now up to 15% faster. bpo-32355: Optimize
asyncio.gather() 06 زदী प೯ೞӝ

asyncio.gather ৘ઁ 06 زदী प೯ೞӝ

• ੋ੗۽ ٜযৡ ௏ܖ౯ ೞաೞա݃׮ functools.partial ೞ؍ ࠗ࠙ਸ ઁѢ •
ensure_future৬ ઺ࠂغח ۽૒ ઁѢ !94 ੉ ѐࢶ੄ ઱ ղਊ 06 زदী प೯ೞӝ

!95 functools.partial ઁѢ 05 ੉߮౟ ܖ೐ оઉয়ӝ

!96 06 زदী प೯ೞӝ #4913 PR

!97 06 زदী प೯ೞӝ #4913 PR ӝઓূ ೞա ՘զ ٸ݃׮
Ѿҗܳ ੷੢೮׮ݶ ѐࢶ റূ ׮ ՘աݶ Ӓٸࢲঠ Ѿҗܳ ੷੢

07 asyncio.ensure_future

!99 bpo-33505: Optimize asyncio.ensure_future by reordering if conditions Optimize asyncio.ensure_future()
by reordering if checks: 1.17x faster. 07 asyncio.ensure_future

• ensure_futureח ੋ੗о futureо ইפݶ future۽ ߸ജ • future.isfuture()۽ futureੋ૑
ݢ੷ ѨࢎೞҊ coroutines.iscoroutine()۽ ௏ ܖ౯ੋ૑ Ѩࢎೣ • Ӓؘ۠ पઁ۽ ࢎਊೞחѦ ࠁݶ ؀ࠗ࠙ run_until_complete()ی async ೣࣻо ֈয ৡ gather() ীࢲ ࢎਊؽ • Ӓ۞޲۽ ௏ܖ౯ਸ ݢ੷ Ѩࢎೞب۾ ifޙ ࣽࢲܳ ߄Է !100 ੉ ѐࢶ੄ ઱ ղਊ 07 asyncio.ensure_future

• ensure_futureח ੋ੗о futureо ইפݶ future۽ ߸ജ • future.isfuture()۽ futureੋ૑
ݢ੷ ѨࢎೞҊ coroutines.iscoroutine()۽ ௏ ܖ౯ੋ૑ Ѩࢎೣ • Ӓؘ۠ पઁ۽ ࢎਊೞחѦ ࠁݶ ؀ࠗ࠙ run_until_complete()ی async ೣࣻо ֈয ৡ gather() ীࢲ ࢎਊؽ • Ӓ۞޲۽ ௏ܖ౯ਸ ݢ੷ Ѩࢎೞب۾ ifޙ ࣽࢲܳ ߄Է !101 ੉ ѐࢶ੄ ઱ ղਊ 07 asyncio.ensure_future tmi: async def۽ ࢶ঱ೠ ೣࣻח ௏ܖ౯ਸ ࢤࢿ ೞח ೣࣻо ؽ

ইө ৘ઁ 07 asyncio.ensure_future

08 typing ݽٕ оઉয়ӝ

!104 As a result of PEP 560 work, the import
time of typing has been reduced by a factor of 7, and many typing operations are now faster. bpo-32226: Implement PEP 560: Core support for typing module and generic types 08 typing ݽٕ оઉয়ӝ

• ઁ֎ܼ ഋधਸ ؊ ੜ ૑ਗೞӝ ਤ೧ ౠࣻ ݫࢲ٘ܳ ୶о
• __class_getitem__, __mro_entries__ !105 ੉ ѐࢶ੄ ઱ ղਊ 08 typing ݽٕ оઉয়ӝ

• ఋੑ ൦౴ਸ ઁউೠ PEP-484਷ ੋఠ೐ܻఠ ۨ߰੄ ߸҃਷ হب۾ ٣੗ੋؽ
• Ӓېࢲ Generic[T], Iterable[int], List[str] ١ਸ ҳഅೞӝ ਤ೧ࢶ ৈ۞о૑ ౟ܼ ਸ ࢎਊೡ ࣻ ߆ী হ঻਺. __getitem__਷ ੋझఢझীࢲ݅ ز੘ೞҊ ௿ېझীࢶ ز੘ೞ ૑ ঋ਺ • Ӓؘ۠ ੉ઃ ఋ੉ೝ, ఋੑ ൦౟о օܻ ࢎਊغפ ੉ ઁೠਸ ಽয ઁ֎ܼ ഋध ૑ਗਸ ਤೠ ౠࣻ ݫࢲ٘ܳ ୶оೣ. ੉ѱ PEP-560੄ ղਊ !106 ੉ ѐࢶ੄ ઱ ղਊ 08 typing ݽٕ оઉয়ӝ

• ࢜܂ѱ ୶оػ __class_getitem__੉ যڌѱ ࢿמਸ ѐࢶदௌח૑ח #4906 PRী 2,400઴੄
diﬀ۽ ੗ࣁ൤ ա৬੓਺. • Ӓزউ typing ݽٕ੉ importо ו۷חؘ Ѣ੄ ઁ֎ܼఋੑ ٸޙ੉঻਺ • ੉ ߸҃ਵ۽ ݽٕ importח 7ߓ, ઁ֎ܼ ௿ېझ ࢤࢿ਷ 4ߓ ࡈۄ૗ • ਬੌೠ ࠳ۨ੉ఊ ୓ੋ૑ח ೧׼ ؍؊ݫࣗ٘ܳ ੐੄۽ ҳഅ೧ ׮ܲ ਊب۽ ॳҊ੓؍ ௏٘ • ೞ૑݅ ੉޷ ؍؊ݫࣗ٘ח ҃Ҋহ੉ ӵ૕ࣻ੓׮Ҋ ੸যְӝী ޙઁ হ਺ !109 ੉ ѐࢶ੄ ઱ ղਊ 08 typing ݽٕ оઉয়ӝ

09 ܻझ౟ ੿۳

!114 sorted() and list.sort() have been optimized for common cases
to be up to 40-75% faster. bpo-28685: Optimizing list.sort() by performing safety checks in advance 09 ܻझ౟ ੿۳

• ੿۳ ঌҊ્ܻਸ ߸҃ೠ Ѫ੉ ইש • ܻझ౟ܳ ੿۳ೡ ٸ
؀ࠗ࠙੄ ҃਋ чٜ੉ ࢲ۽ زੌೠ ఋੑ੉ۄҊ о੿ • ݒߣ чਸ ࠺Үೡ ٸ݃׮ ఋੑ Ѩࢎೞ૑ ݈Ҋ ޷ܻ ೠ ߣ݅ ೧ف੗! о ই੉٣য !115 ੉ ѐࢶ੄ ઱ ղਊ 09 ܻझ౟ ੿۳

• ੿۳ ঌҊ્ܻਸ ߸҃ೠ Ѫ੉ ইש • ܻझ౟ܳ ੿۳ೡ ٸ
؀ࠗ࠙੄ ҃਋ чٜ੉ ࢲ۽ زੌೠ ఋੑ੉ۄҊ о੿ • ݒߣ чਸ ࠺Үೡ ٸ݃׮ ఋੑ Ѩࢎೞ૑ ݈Ҋ ޷ܻ ೠ ߣ݅ ೧ف੗! о ই੉٣য !116 ੉ ѐࢶ੄ ઱ ղਊ 09 ܻझ౟ ੿۳

• ৈ۞о૑ о੿ਸ ࣁ਋Ҋ pre-check stageܳ ݅ٝ • safe_object_compare: ৈ۞
ఋੑ੉ ੓׮Ҋ о੿, ӝઓী ࢎਊೞ؍ উ੹ೠ ߑध • unsafe_object_compare: ೠ ఋੑ੉ۄҊ о੿ • unsafe_latin_compare: Latin ޙ੗ৌ੉ۄҊ о੿ • Ӓ ৻ int, float, tuple۽ ੉ܖয૓ ܻझ౟ۄҊ о੿ • о੿ਸ ѨૐೞҊ ੸ਊ೧ ࠺ਊ੉ ࠺ऴ উ੿ࢿ Ѩࢎܳ ਋ഥೞח ୭੸ച ࠺Ү ೣࣻ ࢎਊ !117 ੉ ѐࢶ੄ ઱ ղਊ 09 ܻझ౟ ੿۳

!118 09 ܻझ౟ ੿۳ #582 PR

!119 09 ܻझ౟ ੿۳ #582 PR п о੿ٜਸ Ѩૐೞח C
௏٘৬ ୭੸ചػ ࠺Ү ೣࣻח যڌѱ ࢤ҂ח૑ח ࢤۚ

!120 ই઱ ୭ঈ੄ ҃਋ ਤ੄ о੿ٜ੉ ݽف ౣܻѱ غҊ ӝࠄز੘ੋ
safe_object_compare۽ ֈযоӝө૑ pre-check ٸޙী 15%੿ب ו۰૗ 09 ܻझ౟ ੿۳

10 ٤࣊ցܻ ࠂࢎ

!122 dict.copy() is now up to 5.5 times faster. bpo-31179:
Speed-up dict.copy() up to 5.5 times. 10 ٤࣊ցܻ ࠂࢎ

• ਗېח ࠼ dictܳ ٜ݅Ҋ key, valueܳ ೞաঀ ୶о •
ӝઓ dict ੹୓ key, value ৔৉੄ ݫݽܻܳ ా૩۽ ࠂࢎ(memcpy)ೞҊ ۨಌ۠झ ஠਍౟ ܳ ט۰઱੗(increfs)! о ই੉٣য • ܻ࠭যо ੗઱ ࢎਊೞ૑ ঋח ӝמٸޙী 50઴੄ C ௏٘ܳ ୶оೠ׮Ҋ ਬ૑ࠁࣻ ஏݶী ࢲ ৏۰ೣ • ೞ૑݅ ੷੗о 50݅ ઴ ੉࢚੄ ೐۽ં౟ա ORMীࢲ dict.copyח ഝߊ൤ ࢎਊೠ׮ ঱ әೞݴ 5.5ߓ ࡅܰѱೞחѤ ୽࠙൤ ੄޷੓׮Ҋ ࢸٙ. tmi: ੷੗ח asyncpg੄ ݫੋప੉ց !123 ੉ ѐࢶ੄ ઱ ղਊ 10 ٤࣊ցܻ ࠂࢎ

• ਗېח ࠼ dictܳ ٜ݅Ҋ key, valueܳ ೞաঀ ୶о •
ӝઓ dict ੹୓ key, value ৔৉੄ ݫݽܻܳ ా૩۽ ࠂࢎ(memcpy)ೞҊ ۨಌ۠झ ஠਍౟ ܳ ט۰઱੗(increfs)! о ই੉٣য • ܻ࠭যо ੗઱ ࢎਊೞ૑ ঋח ӝמٸޙী 50઴੄ C ௏٘ܳ ୶оೠ׮Ҋ ਬ૑ࠁࣻ ஏݶী ࢲ ৏۰ೣ • ೞ૑݅ ੷੗о 50݅ ઴ ੉࢚੄ ೐۽ં౟ա ORMীࢲ dict.copyח ഝߊ൤ ࢎਊೠ׮ ঱ әೞݴ 5.5ߓ ࡅܰѱೞחѤ ୽࠙൤ ੄޷੓׮Ҋ ࢸٙ. tmi: ੷੗ח asyncpg੄ ݫੋప੉ց !124 ੉ ѐࢶ੄ ઱ ղਊ 10 ٤࣊ցܻ ࠂࢎ

11 ੿ӏ಴അध

!126 Optimized case-insensitive matching and searching of regular expressions. Searching
some patterns can now be up to 20 times faster. bpo-30285: Optimize case-insensitive regular expressions 11 ੿ӏ಴അध

• ӝઓ੄ case-insensitive ݽ٘(re.IGNORECASE)ח ݽٚ ޙ੗ܳ lower case۽ ٜ݅Ҋ ݻо૑
୭੸ചܳ ࠺ഝࢿചೣ • ೞ૑݅ য়۽૑ 2669ѐ੄ Ӗ੗݅੉ lower/upper case ҳ࠙੉ ੓਺ • ब૑য ইझః ݽ٘(re.ASCII)ীࢶ ױ 52Ӗ੗ • ೧׼ Ӗ੗ٜ݅ ٮ۽ ୊ܻೞҊ աݠ૑ ݽٚ Ӗ੗ী ؀೧ࢶ case-sensitive ݽ٘੄ ୭੸ച ب ੸ਊ೧ ࡅܲ ࣘب۽ ୊ܻೞѱՔ ѐࢶ !127 ੉ ѐࢶ੄ ઱ ղਊ 11 ੿ӏ಴അध

__exit__():

Python 3.6 vs 3.7 ӝࠄ ݫࢲ٘ ഐ୹ ౵੉ॆ द੘ दр
ੋझఢझ ݫࢲ٘ ഐ୹ asyncio.sleep ੉߮౟ ܖ೐ оઉয়ӝ زदী प೯ೞӝ asyncio.ensure_future typing ݽٕ оઉয়ӝ ܻझ౟ ੿۳ ٤࣊ցܻ ࠂࢎ ੿ӏ಴അध ՘ਵ۽

Python 3.6 vs 3.7 ՘ਵ۽

Python 3.6 vs 3.7 ՘ਵ۽ pyperf

Python 3.6 vs 3.7 ՘ਵ۽

• ౵੉ॆ 3.7 ୶ୌ೤פ׮, ౠ൤ ࠺زӝܳ ॵ׮ݶ ؊਌ • ౵੉ॆ਷
ו݀פ׮, ೞ૑݅ न҃ॳ૑ ঋणפ׮ • ಌನݢझী ӝৈ೧઱न ஶ౟ܻ࠭ఠٜ࠙ хࢎ೤פ׮ !134 ೞҊर਷ ݈ Victor Stinner Inada Naoki Ivan Levkivskyi Yury Selivanov Sethiy Storchaka else: ՘ਵ۽

!135 ਺ ࡅܰҳա Ӓա݃ ...

!136 য় ࡅܰҳա ੉ېࢲ !

session.close()

Why is Python 3.7 fastest

Why is Python 3.7 fastest

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