{"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\/hu\/blog\/news\/proekt-gentoo-predstavil-sistemu-upravleniya-paketami-portage-3-0","title":{"rendered":"A Gentoo projekt bemutatta a Portage 3.0 csomagkezel\u0151 rendszert","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Stabiliz\u00e1lt<\/a><\/noindex> a csomagkezel\u0151 rendszer kiad\u00e1sa Portage 3.0<\/a><\/noindex>, amely a disztrib\u00faci\u00f3ban alkalmaz\u00e1sra ker\u00fclt Gentoo Linux<\/a><\/noindex>. A bemutatott \u00e1g \u00f6sszegzi a Python 3-ra val\u00f3 \u00e1tt\u00e9r\u00e9s hossz\u00fa munk\u00e1j\u00e1t, \u00e9s megsz\u00fcnteti a Python 2.7 t\u00e1mogat\u00e1s\u00e1t. <\/p>\n

A Python 2.7 t\u00e1mogat\u00e1s\u00e1nak megsz\u00fcntet\u00e9se mellett egy m\u00e1sik fontos v\u00e1ltoz\u00e1s a k\u00f6vetkez\u0151 optimaliz\u00e1ci\u00f3k bevezet\u00e9se<\/a><\/noindex>, amelyek 50-60%-kal gyorsabb\u00e1 tett\u00e9k a f\u00fcgg\u0151s\u00e9gek meghat\u00e1roz\u00e1s\u00e1val kapcsolatos sz\u00e1m\u00edt\u00e1sokat. \u00c9rdekes, hogy egyes fejleszt\u0151k azt javasolt\u00e1k, hogy a f\u00fcgg\u0151s\u00e9gfelold\u00f3 k\u00f3dot C\/C++ vagy Go nyelven \u00edrj\u00e1k \u00e1t a teljes\u00edtm\u00e9ny jav\u00edt\u00e1sa \u00e9rdek\u00e9ben, de a probl\u00e9m\u00e1t viszonylag egyszer\u0171en siker\u00fclt megoldani.<\/p>\n

A megl\u00e9v\u0151 k\u00f3d profiloz\u00e1sa azt mutatta, hogy a sz\u00e1m\u00edt\u00e1sok sor\u00e1n a legnagyobb id\u0151t a use_reduce \u00e9s catpkgsplit f\u00fcggv\u00e9nyek h\u00edv\u00e1sa t\u00f6lti el, ism\u00e9tl\u0151d\u0151 argumentumk\u00e9szlettel (p\u00e9ld\u00e1ul a catpkgsplit f\u00fcggv\u00e9nyt 1-5 milli\u00f3szor h\u00edvt\u00e1k meg). A gyors\u00edt\u00e1s \u00e9rdek\u00e9ben a funkci\u00f3k eredm\u00e9nyeinek caching-j\u00e9t alkalmazt\u00e1k sz\u00f3t\u00e1rak haszn\u00e1lat\u00e1val. Az lru_cache be\u00e9p\u00edtett funkci\u00f3 volt a legoptim\u00e1lisabb a cache t\u00e1rol\u00e1s\u00e1hoz, de ez csak a Python 3.2 verzi\u00f3t\u00f3l volt el\u00e9rhet\u0151. A kor\u00e1bbi verzi\u00f3k kompatibilit\u00e1sa \u00e9rdek\u00e9ben egy helyettes\u00edt\u0151 ker\u00fclt hozz\u00e1ad\u00e1sra, amely helyettes\u00edtette az lru_cache-t, de a Python 2.7 Portage 3.0-ban val\u00f3 t\u00e1mogat\u00e1s\u00e1nak megsz\u00fcntet\u00e9se jelent\u0151sen leegyszer\u0171s\u00edtette a feladatot, lehet\u0151v\u00e9 t\u00e9ve a r\u00e9teg n\u00e9lk\u00fcli megold\u00e1st. <\/p>\n

A gyors\u00edt\u00f3t\u00e1r haszn\u00e1lata lehet\u0151v\u00e9 tette az «emerge -uDvpU —with-bdeps=y @world» m\u0171velet v\u00e9grehajt\u00e1si idej\u00e9nek cs\u00f6kkent\u00e9s\u00e9t a ThinkPad X220 laptopon 5 perc 20 m\u00e1sodpercr\u0151l 3 perc 16 m\u00e1sodpercre (63%). M\u00e1s rendszereken v\u00e9gzett tesztek legal\u00e1bb 48%-os teljes\u00edtm\u00e9nyn\u00f6veked\u00e9st mutattak.<\/p>\n

A v\u00e1ltoztat\u00e1st el\u0151k\u00e9sz\u00edt\u0151 fejleszt\u0151 egy protot\u00edpus k\u00f3dot is pr\u00f3b\u00e1lt megval\u00f3s\u00edtani a f\u00fcgg\u0151s\u00e9gfelold\u00e1sra C++ vagy Rust nyelven, de a feladat t\u00fal bonyolultnak bizonyult, mivel nagy mennyis\u00e9g\u0171 k\u00f3d \u00e1tkonvert\u00e1l\u00e1s\u00e1t ig\u00e9nyelte, \u00e9s k\u00e9ts\u00e9ges volt, hogy az eredm\u00e9ny meg\u00e9rte volna a r\u00e1ford\u00edtott id\u0151t \u00e9s energi\u00e1t. <\/p>\n

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

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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