Why is Python 3.7 fastest

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

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ডр જইೡ ࢎۈ݅ જইೡ ઱ઁ
ߊ಴ ࣗѐ

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੉۠ ઱ઁ۽ ߊ಴ܳ ೞח ੉ਬ
ߊ಴ ࣗѐ

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࢜ ߡ੹੉ ܾܻૉؼ ٸ݃׮ ୃѹࠁѱ غח
What's New In Python 3.x
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3.7 ੉੹ীب performance improvement৬
optimizationী ؀ೠ ೦ݾ਷ ઓ੤
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• 3~5ߓ ࡈۄ૓ os.walk() ೣࣻ

• bytes(int) ѐࢶ

• 10% ࡈۄ૓ ੿ӏ಴അध ౵य

• 25% ࡈۄ૓ property() getter ഐ୹

• ١١ ੗ੜೠ ѐࢶ
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Python 3.5 Optimizations
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• C۽ ҳഅೠ asyncio.Future, asyncio.Task

• 30ߓ ࡅܲ typing ݽٕ

• ~4ߓ ࡈۄ૓ os.scandir()
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Python 3.6 Optimizations
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3.7ীࢶ ௐ ૘য ঱әೠ Optimizations
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୊਺ 3.7੉ ܾܻૉغҊ
Ӓٺ Ӓր 'য় ࡈۄ઎ҳա જ֎'
ߊ಴ ࣗѐ

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3ର ௑࢟۞٘ - ߛ௼࢟۞٘ ౵੉ॆݍ ۨदೖ ߊ಴
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౵੉ॆ 3.7੉ о੢ ࡅܲ ۠ఋ੐ ߡ੹੉ۄ ࣗѐ

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੉ ٸب Ӓր 'о੢ ࡅܰҳա'
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৵ ࡅܲ૑ ࢓ಝࠁ۰Ҋ ೞӟ೮ਵա...
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਺ bpo-xxxxx? ੉Ѥ ަө...

Issue#2334 ੉۠Ѥ ঌѷחؘ...
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ই bugs.python.org ۽ ҙܻೞח ੉ग ֈߡ݂੉ҳա

ٜযоࠁ੗
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bpo-29300

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ߊ಴ ࣗѐ
bpo-29300
੉ѱ ޤঠ...

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ղѱ ੊ࣼೠѤ ੉۠ ചݶੋؘ...
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PR ߑध੉ ੊ࣼೞ؍ աীѱ

ц੗ӝ ࠙ਤӝ patch
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bpo-29300

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ଵҊ۽ 2017֙ 2ਘࠗఠ CPython ѐߊ਷ hgীࢲ GitHubਵ۽ ੉زೣ

੉ग౟ېఊب GitHub Issueܳ ࢎਊೞ੗ח PEP-581੉ थੋغয ૓೯ ઺
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Ӓۧѱ ױ֛ೞҊ ૑ղ؍ ઺
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ߊ಴ ࣗѐ
Ӓې! աب ݽܰחѦ ߊ಴೧ࠁ੗

Ӓ۞ݶ র૑۽ۄب ׮ ࡸࣿ ࣻ ੓ѷ૑?!

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

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• ੷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
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য়ט ݈ೞ૑ ঋਸ ղਊ
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• ࢿמ ѐࢶਸ ਤ೧ যڃ ই੉٣যо ੓঻ա

• ؊ ঌҊर׮ݶ য٣ܳ ࠁݶ ؼ૑

• Ӓېب ৮੹ য۵૑݅਷ ঋ਷ C ௏٘
!30
য়ט ݈ೡ ղਊ
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੿ѹ਎
Jung Winter
ߛ௼࢟۞٘ ߔূ٘ ূ૑פয
res_tin
JungWinter
ߊ಴੗

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!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__()

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!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

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• ಴ળ ۄ੉࠳۞ܻী ࣘೠ ௿ېझী ੓ח ৈ۞ ݫࢲٜ٘ਸ ୭੸ച೮׮.

• METH_FASTCALL ஶ߮࣌ਸ ٮܰب۾ ߄Ծ׮.
!35
੉ ѐࢶ੄ ઱ ղਊ

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collections.deque੄ index(), insert(), rotate()

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collections.deque੄ index(), insert(), rotate() __getitem__()

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collections.deque੄ index(), insert(), rotate() __getitem__()
str੄ replace(), ljust(), rjust(), strip(), upper() ١

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METH_FASTCALL੉ ޤӡې

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• 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

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• 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
؊ Өѱ ঌҊर׮ݶ

bpo-27810, ҙ۲ mailing list

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Python/C API Reference Manual: Common Object Structures

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Python 3.8ী ୶оػ positional arguments ѐ֛

METH_FASTCALL਷ ࡅܲ؀न keyword arguments ॶ ࣻ হ਺
Python/C API Reference Manual: Common Object Structures

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GitHub - ipython

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Review: Use FASTCALL for collections.deque methods: index, insert, rotate
੉۠धਵ۽ ೣࣻ੄ दӒפ୛৬
౵य۽૒੉ ߄Պ

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• ೣࣻ ߸ജҗ ࢤࢿਸ ب৬઱ח بҳ

• CPython ղ੢ ೣࣻ ੋࣻ ୊ܻܳ ذח DSL

• PEP-436җ how to clinic ޙࢲ
!46
Argument Clinic

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• ೣࣻ ߸ജҗ ࢤࢿਸ ب৬઱ח بҳ

• CPython ղ੢ ೣࣻ ੋࣻ ୊ܻܳ ذח DSL

• PEP-436җ how to clinic ޙࢲ
!47
Argument Clinic

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׮নೠ ݫࢲٜ٘੉ ~30% ੿ب ࡈۄ૗

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02 ౵੉ॆ द੘ दр

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!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

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• abcݽٕਸ C۽ ׮द ૧׮.

• site.pyо ࢎਊೞח sysconfig.py੄ ౠ੿ ೣࣻܳ import ೞ૑ ঋҊ ࠂࢎ೧ࢲ ࢎਊೞ
ب۾ ߄Ծ׮.

• ؒਵ۽ isinstance৬ issubclassب 1.5ߓ ࡈۄ઎׮.
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02 ౵੉ॆ द੘ दр

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C۽ ׮द ૠ abc ݽٕ
02 ౵੉ॆ द੘ दр

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02 ౵੉ॆ द੘ दр
ղਊ਷ Ӓր abc ݽٕਸ C۽ ૧׮.

؊ ঌҊ र׮ݶ #5273 PR

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02 ౵੉ॆ द੘ दр
ೠ ׳р

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02 ౵੉ॆ द੘ दр
ೠ ׳р

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02 ౵੉ॆ द੘ दр
ೠ ׳р ড 300ѐ੄ ܻ࠭

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

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૑ࣘ оמೠ ਬ૑ࠁࣻܳ ୶ҳೞח ݽण
02 ౵੉ॆ द੘ दр

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

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• 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

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02 ౵੉ॆ द੘ दр

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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

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• positional arguments ೣࣻ ഐ୹ী ؀ೠ ࢜۽਍ opcode 2ѐ ୶о

• LOAD_METHOD, CALL_METHOD
• ӝઓ opcodeܳ ߄Լب ع૑݅ ੉ۡ҃਋ ݆਷ ࠗ࠙ীࢲ য়൤۰ ࢿמ ೞۅ
!64

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• positional arguments ೣࣻ ഐ୹ী ؀ೠ ࢜۽਍ opcode 2ѐ ୶о

• LOAD_METHOD, CALL_METHOD
• ӝઓ opcodeܳ ߄Լب ع૑݅ ੉ۡ҃਋ ݆਷ ࠗ࠙ীࢲ য়൤۰ ࢿמ ೞۅ
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؊ ঌҊ र׮ݶ bpo-26110: Patch Set

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TMI
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

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04 asyncio.sleep

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!68
ਫ਼द एযоח दр

рױೠ ই੉٣য۽ ࢿמ ೱ࢚ਸ ੉ܞմ PRب ੓਺
04 asyncio.sleep

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!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

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

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04 asyncio.sleep

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04 asyncio.sleep
ܖ೐ оઉ৬ Future ݅٘ח җ੿

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04 asyncio.sleep
ܖ೐ী झாે݂ ೞח җ੿

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

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05 ੉߮౟ ܖ೐ оઉয়ӝ

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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

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• 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
05 ੉߮౟ ܖ೐ оઉয়ӝ

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• 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
ࢿמ ೱ࢚੄
80% ਃੋ
05 ੉߮౟ ܖ೐ оઉয়ӝ

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C۽ ׮द ૠ get_event_loop
05 ੉߮౟ ܖ೐ оઉয়ӝ

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

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

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!82
05 ੉߮౟ ܖ೐ оઉয়ӝ

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ѐࢶػ getpid()
05 ੉߮౟ ܖ೐ оઉয়ӝ

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05 ੉߮౟ ܖ೐ оઉয়ӝ
#5277 PR

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

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05 ੉߮౟ ܖ೐ оઉয়ӝ
#5277 PR
ఋੑਸ ࠺Ү

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05 ੉߮౟ ܖ೐ оઉয়ӝ
#5277 PR

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• 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

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

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!91
async ҙ۲ ѐࢶ਷ খਵ۽ ૣ਷Ѣ ೞա݅ ؊ թওणפ׮!

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

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asyncio.gather ৘ઁ

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• ੋ੗۽ ٜযৡ ௏ܖ౯ ೞաೞա݃׮ functools.partial ೞ؍ ࠗ࠙ਸ ઁѢ

• ensure_future৬ ઺ࠂغח ۽૒ ઁѢ
!94

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

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!96
#4913 PR

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!97
#4913 PR
ӝઓূ ೞա ՘զ ٸ݃׮ Ѿҗܳ ੷੢೮׮ݶ

ѐࢶ റূ ׮ ՘աݶ Ӓٸࢲঠ Ѿҗܳ ੷੢

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

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• 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

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• 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
tmi: async def۽ ࢶ঱ೠ ೣࣻח ௏ܖ౯ਸ ࢤࢿ
ೞח ೣࣻо ؽ

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ইө ৘ઁ

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!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

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• ઁ֎ܼ ഋधਸ ؊ ੜ ૑ਗೞӝ ਤ೧ ౠࣻ ݫࢲ٘ܳ ୶о

• __class_getitem__, __mro_entries__
!105

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• 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

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૑ ঋ਺

!107

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૑ ঋ਺

!108

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• ࢜܂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

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2,400઴੄ diﬀ۽ ੗ࣁ൤ ա৬੓਺.




!110

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2,400઴੄ diﬀ۽ ੗ࣁ൤ ա৬੓਺.




!111

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2,400઴੄ diﬀ۽ ੗ࣁ൤ ա৬੓਺.




!112

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09 ܻझ౟ ੿۳

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!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

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• ੿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
09 ܻझ౟ ੿۳

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• ੿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
09 ܻझ౟ ੿۳

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• ৈ۞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
09 ܻझ౟ ੿۳

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!118
09 ܻझ౟ ੿۳
#582 PR

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!119
09 ܻझ౟ ੿۳
#582 PR
п о੿ٜਸ Ѩૐೞח C ௏٘৬

୭੸ചػ ࠺Ү ೣࣻח যڌѱ ࢤ҂ח૑ח ࢤۚ

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!120
ই઱ ୭ঈ੄ ҃਋ ਤ੄ о੿ٜ੉ ݽف ౣܻѱ غҊ

ӝࠄز੘ੋ safe_object_compare۽ ֈযоӝө૑
pre-check ٸޙী 15%੿ب ו۰૗
09 ܻझ౟ ੿۳

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10 ٤࣊ցܻ ࠂࢎ

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!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

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• 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
10 ٤࣊ցܻ ࠂࢎ

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• 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
10 ٤࣊ցܻ ࠂࢎ

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11 ੿ӏ಴അध

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!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

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• 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
11 ੿ӏ಴അध

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__exit__():

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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۽

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Python 3.6 vs 3.7
՘ਵ۽

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Python 3.6 vs 3.7
՘ਵ۽
pyperf

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Python 3.6 vs 3.7
՘ਵ۽

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• ౵੉ॆ 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۽

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!135
਺ ࡅܰҳա
Ӓա݃ ...

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!136
য় ࡅܰҳա
੉ېࢲ !

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session.close()

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Why is Python 3.7 fastest

Why is Python 3.7 fastest

Winter Jung

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