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Compact GC Head
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INADA Naoki
June 25, 2018
Technology
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Compact GC Head
Python の GCヘッダを減らすために今挑戦していることを紹介します。
INADA Naoki
June 25, 2018
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Transcript
$PNQBDU 1Z($@)FBE UDGNNFFUVQ *OBEB/BPLJ !NFUIBOF
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$PNQBDU0SEFSFE%JDU w .Z42-%SJWFST (P 1ZUIPO
1ZUIPOͷ($ wࢀরΧϯτ w॥ࢀর($ɹˡࠓͷ wࢼݧআΞϧΰϦζϜ w ʮΨϕʔδίϨΫγϣϯ ࣗಈతϝϞϦཧΛߏ͢Δཧͱ࣮ʯ IUUQTXXXBNB[PODPKQEQ
ࢼݧআͷ֓ཁ w ΦϒδΣΫτͷू߹Λ८ճͯ͠ɺू߹ͷΦϒδΣΫτؒ ͷࢀরͷ͚ͩࢀরΧϯτΛݮΒͯ͠ΈΔ w ࢀরΧϯτ͕ͬͯΔΦϒδΣΫτ֎͔Βࢀর͞Εͯ ͍Δˠϧʔτʢੜଘʣ w ϚʔΫˍεΠʔϓͷΑ͏ʹɺϧʔτ͔Β࠶ؼతʹੜଘΦϒ δΣΫτΛܾఆ
1ZUIPOͷ࣮ ϫʔυ _gc_head *gc_next; _gc_head *gc_prev; ssize_t gc_refcnt;
HD@OFYU HD@QSFW w ํϦϯΫϦετ w ֤ੈͷΦϒδΣΫτͷू߹Λཧ w ҙͷΦϒδΣΫτΛ0 Ͱ֎ͤΔ
HD@SFGDOU w ࢼݧআ༻ࢀরΧϯτ w ෛͷఆ w 53"$,&% ΑΓݹ͍ੈͷΦϒδΣΫτ
w 6/53"$,&% ཧ֎ʣ w 5&/5"5*7&-:@6/3&"$)"#-& আީิ w 3&"$)"#-& ੜଘ֬ఆ w CJUΛผ్ͷϑϥάͰར༻
None
ϚʔΫϑΣʔζ w HDMJTUΛ८ճͯ͠HD@SFGDOU͕ w VOSFBDIBCMFϦετʹҠಈ আީิ w ੜଘ֬ఆɺΦϒδΣΫτͷࢀরઌνΣοΫ w
ࢀরઌ͕VOSFBDIBCMFͳΒHDMJTUͷඌʹ෮ؼ w HDMJTUͷऴʹ౸ୡͨ͠ʹ࠶ؼతͳϚʔΫྃ
$PNQBDU($)FBE wHD@QSFWͱHD@SFGDOUͰϝϞϦڞ༗ w HD@QSFWϦετ͔ΒཁૉΛআ͢ΔͨΊ w ࢼݧআதॱํ८ճ͚ͩͰ͍͍ w ϚʔΫϑΣʔζͰHDMJTU VOSFBDIBCMFؒҠಈ w
ϋοΫͰ͖ͦ͏ʁ
None
)BDLJOHNBSL w ॳظঢ়ଶHD@OFYUͱHD@SFGDOUͷΈͷ୯ํϦϯΫϦ ετ w ҰͭखલΛ֮͑ͳ͕Β८ճ w ੜଘ֬ఆͳΒHD@SFGDOUΛ௵ͯ͠HD@QSFWQSFW w VOSFBDIBCMFʹҠಈ͢Δͱ͖HD@SFGDOUΛ௵͢
w ෮ؼ࣌HD@SFGDOUͰ୯ํϦϯΫϦετԽ
ࢀরઌʹύλʔϯ͋Δɻ Ͳ͏ݟ͚Δ͔ɻ
HD@SFGDOU ࠶ w ࢼݧআ༻ࢀরΧϯτ w ෛͷఆ w 53"$,&%
ΑΓݹ͍ੈͷΦϒδΣΫτ w 6/53"$,&% ཧ֎ʣ w 5&/5"5*7&-:@6/3&"$)"#-& আީิ w 3&"$)"#-& ੜଘ֬ఆ w CJUΛผ్ͷϑϥάͰར༻
ঢ়ଶμΠΤοτ w 53"$,&% 6/53"$,&% w HDMJTUʹೖ͍ͬͯΔ͔Ͳ͏͔ͰϏοτඞཁ w HD@OFYU/6--Ͱཧ͞ΕͯΔ͔அ w 5&/5"5*7&-:@6/3&"$)"#-&
3&"$)"#-& w Ϗοτඞཁ w CJUΛผ్ͷϑϥάͰར༻ w ߹ܭϏοτඞཁ
5BHHFE1PJOUFS w ϙΠϯλมʹೖΔΞυϨεͷ͏ͪɺ͕ʢओʹʹʣݻ ఆ͍ͯ͠ΔϏοτΛϑϥάͳͲʹར༻͢Δ w ϑϥάΛͬͯϙΠϯλ͡Όͳ͍ΛೖΕΔ w ͍จࣈྻ CJUͳΒόΠτ·Ͱʁ
w w ྨࣅͷٕज़ුಈখͷ/B/ͷੑΛͬͨ /B/#PYJOH
ΞυϨεͷະ༻CJU w Y@ͷΞυϨε࣮࣭ͬͯόΠτͰʁ w ࠷ۙόΠτʹ֦ு͞ΕͨΒ͍͠ w ্ҐϏοτΛ৮Δͷকདྷੑʹෆ҆ w ͦͦΞʔΩґଘ w
.BMMPD݁Ռ͕όΠτBMJHOFE w ԼҐCJU௵ͤΔ w ϚΠφʔͳΞʔΩˍNBMMPD࣮Ͱෆ҆
HD@QSFWHD@SFGT HD@QSFWHD@SFGT 6OSFBDIBCMF $PMMFDUJOH طଘϑϥά
ࢀরΧϯτͷ্ք w HD@SFGDOU͕Φʔόʔϑϩʔ͠ͳ͍͔ߟ͑Δ w Ϣʔβʔۭؒͷ֤ϙΠϯλ͕ͭͷࢀরΛ࡞Δ w ΞυϨεۭ͕ؒCJUͰɺϙΠϯλ͕CZUFͳΒɺϙΠϯλ ͷͷ্ք?
w 0, w ΞυϨεۭ͕ؒCJUͰɺϙΠϯλ͕CZUFͳΒɺϙΠϯλ ͷ্ք? w CJU༨ͬͯͳ͍ w Ϣʔβʔۭؒී௨ʹ(#ʢCJUʣʹͳΔ
݁ w CJUڥͳΒ w ࢀরΧϯλ࣮֬ʹCJU༨ͬͯΔ w ΄΅࣮֬ʹϙΠϯλͷԼҐCJUΘΕͳ͍ w CJUڥͩͱ w
ࢀরΧϯτCJU༨ͬͯͳ͍ w CZUFΞϥΠϯͷNBMMPD࣮ͷةݥੑ͕૿͑Δ
ࠓޙͷํ w HD@OFYUͷԼҐCJUར༻͢Δ w HD@QSFWΛVJOU@Uʹ͢Δ w $PNQBDU࣮ͱطଘ࣮ΛΓସ͑Δ w CJUڥͰσϑΥϧτͰैདྷ࣮
ਓࡐืू w$1ZUIPOͷ։ൃʹڵຯ͕͋Δਓ wQZUIPOKQͷEJTDPSEαʔόʔʹ DPSFEFWνϟϯωϧ࡞Γ·ͨ͠ɻ wটίʔυ[VNDX