{"id":93424,"date":"2020-09-07T07:42:06","date_gmt":"2020-09-07T05:42:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/proekt-gentoo-predstavil-sistemu-upravleniya-paketami-portage-3-0"},"modified":"2020-09-07T07:42:06","modified_gmt":"2020-09-07T05:42:06","slug":"proekt-gentoo-predstavil-sistemu-upravleniya-paketami-portage-3-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/proekt-gentoo-predstavil-sistemu-upravleniya-paketami-portage-3-0","title":{"rendered":"Gentoo projekt tutvustas pakihalduss\u00fcsteemi Portage 3.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Stabiliseeriv<\/a><\/noindex> pakettide haldamise s\u00fcsteemi v\u00e4ljalase Portage 3.0<\/a><\/noindex>, mida kasutatakse jaotises Gentoo Linux<\/a><\/noindex>. Esitatud haru l\u00f5petas pikaajalise t\u00f6\u00f6 \u00fcleminekuks Python 3-le ja Python 2.7 toe l\u00f5petamise. <\/p>\n

Lisaks Python 2.7 toe l\u00f5petamisele oli teine oluline muudatus optimeerimisi<\/a><\/noindex>, mis v\u00f5imaldas arvutusi, mis on seotud s\u00f5ltuvuste m\u00e4\u00e4ratlemisega, kiirendada 50-60%. Huvitav, et m\u00f5ned arendajad pakkusid s\u00f5ltuvuste lahendamise koodi \u00fcmber kirjutamist C\/C++-s v\u00f5i Go-s, et t\u00f6\u00f6 kiirus kasvada, kuid \u00f5nnestus probleem lahendada lihtsate meetoditega.<\/p>\n

Koodi profileerimine n\u00e4itas, et peamine aeg arvutustes kulub funktsioonide use_reduce ja catpkgsplit kutsumisele korduvate argumentide kogumiga (n\u00e4iteks funktsiooni catpkgsplit kutsuti 1 kuni 5 miljonit korda). Kiirusel saavutasime tulemuste vahem\u00e4lu rakendamise kaudu nende funktsioonide jaoks, kasutades s\u00f5nastikke. Parim lahendus vahem\u00e4lu hoidmiseks oli sisseehitatud funktsioon lru_cache, kuid see oli saadaval ainult alates Python 3.2 versioonist. \u00dchilduvuseks varasema versiooniga lisati lru_cache'i asendamise stub, kuid otsus l\u00f5petada Python 2.7 toetamine Portage 3.0-s lihtsustas \u00fclesannet ja v\u00f5imaldas sellest vahekihist loobuda. <\/p>\n

Vahem\u00e4lu kasutamine aitas v\u00e4hendada operatsiooni «emerge -uDvpU —with-bdeps=y @world» t\u00e4itmise aega ThinkPad X220 s\u00fclearvutil 5 minuti 20 sekundi pealt 3 minuti 16 sekundini (63%). Testid teistel s\u00fcsteemidel n\u00e4itasid j\u00f5udluse kasvu mitte alla 48%.<\/p>\n

Muutuse ette valmistanud arendaja proovinud samuti rakendada s\u00f5ltuvuste lahendamise koodiprotot\u00fc\u00fcbi C++ v\u00f5i Rust keeles, kuid \u00fclesanne osutus liiga keeruliseks, kuna see n\u00f5udis suures mahus koodi portimist ja samas oli kahtlane, kas saadud tulemus v\u00e4\u00e4rt oleks tehtud pingutusi. <\/p>\n

<\/a><\/noindex><\/p>\n

Allikas: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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