{"id":33901,"date":"2019-10-31T21:55:19","date_gmt":"2019-10-31T18:55:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/cloudflare-mozilla-i-facebook-razvivayut-binaryast-dlya-uskoreniya-zagruzki-javascript\/"},"modified":"2019-10-31T21:55:19","modified_gmt":"2019-10-31T18:55:19","slug":"cloudflare-mozilla-i-facebook-razvivayut-binaryast-dlya-uskoreniya-zagruzki-javascript","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/cloudflare-mozilla-i-facebook-razvivayut-binaryast-dlya-uskoreniya-zagruzki-javascript","title":{"rendered":"Cloudflare, Mozilla ja Facebook arendavad BinaryAST-i JavaScripti laadimise kiirendamiseks","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Cloudflare, Mozilla, Facebook ja Bloomberg'i insenerid pakuvad<\/a><\/noindex> uut formaati BinaryAST<\/a><\/noindex> , et kiirendada JavaScripti koodi edastamist ja t\u00f6\u00f6tlemist veebilehtede avamisel sirvijates. BinaryAST viib s\u00fcntaktilise parsimise serverisse ja tarnib juba moodustatud abstraktse s\u00fcntaksite puu (AST<\/a><\/noindex>). Kui brauser saab BinaryAST, saab ta kohe minna kompileerimise faasi, m\u00f6\u00f6da minnes JavaScripti l\u00e4htekoodi parsimisest. <\/p>\n

Testimiseks valmistatud<\/a><\/noindex> Viidatud teostus, mida tarnitakse MIT litsentsi alusel. Parsimiseks kasutatakse Node.js komponente ning AST moodustamise ja optimeerimise kood on kirjutatud Rust keeles. Brauserite poolelt on tugi
\nBinaryAST juba saadaval \u00f6\u00f6kogumid<\/a><\/noindex> Firefoxis. BinaryAST-i kodeerijat saab rakendada nii l\u00f5pp-otsingu t\u00f6\u00f6riistade tasemel kui ka v\u00e4liste veebisaitide skriptide pakendamisel proksi v\u00f5i sisu edastamise v\u00f5rgus. Praegu on juba alustatud BinaryAST standardiseerimise protsessi t\u00f6\u00f6r\u00fchma ECMA TC39<\/a><\/noindex>, mille l\u00f5petamisel saab formaat kooseksisteerida olemasolevate sisu tihendamise meetoditega, nagu gzip ja brotli. <\/p>\n

\"Cloudflare,<\/a><\/noindex><\/center>
\n
\"Cloudflare,<\/a><\/noindex><\/center><\/p>\n

JavaScripti t\u00f6\u00f6tlemine v\u00f5tab m\u00e4rkimisv\u00e4\u00e4rselt aega, kuna koodi laadimis- ja s\u00fcntaktilise anal\u00fc\u00fcsi faas kulub enim aega. Arvestades, et paljude tuntud veebisaitide laaditav JavaScript ulatub peaaegu 10 MB-ni (n\u00e4iteks LinkedIn - 7,2 MB, Facebook - 7,1 MB, Gmail - 3,9 MB), toob JavaScripti esmase t\u00f6\u00f6tlemise etapp kaasa m\u00e4rkimisv\u00e4\u00e4rse viivituse. Brauseripoolne anal\u00fc\u00fcsietapp aeglustub samuti, kuna AST-i t\u00f5husat loomist ei saa teha reaalajas koodi laadimise k\u00e4igus (brauser peab ootama koodiplokkide, n\u00e4iteks funktsioonide l\u00f5ppemise, laadimist, et saada praeguste elementide anal\u00fc\u00fcsimiseks vajalikku puuduvat teavet).<\/p>\n

Osaliselt proovivad probleemi lahendada koodi levitamisega minimeeritud ja tihendatud kujul, samuti brauserikandidaatide genereeritud baitkoodi vahem\u00e4llu salvestamise abil. Kaasaegsetes saitides uuendatakse koodi piisavalt tihti, seega lahendab vahem\u00e4llu salvestamine probleemi vaid osaliselt. Lahendus v\u00f5iks olla WebAssembly, kuid see n\u00f5uab koodis selget t\u00fcpiseerimist ning ei sobi h\u00e4sti juba olemasoleva JavaScript'i koodi t\u00f6\u00f6tlemise kiirendamiseks. <\/p>\n

Teiseks v\u00f5imaluseks on valmis kompileeritud baidikoodi kohaletoimetamine JavaScripti skriptide asemel, kuid brauseri mootorite arendajad on sellele vastu, kuna kolmanda osapoole baidikoodi on raske kinnitada, selle vahetu t\u00f6\u00f6tlemine v\u00f5ib viia veebieristumiseni, lisanduvad t\u00e4iendavad turvaohtud ja on vajalik universaalse baidikoodi formaadi arendamine.<\/p>\n

BinaryAST v\u00f5imaldab integreeruda olemasolevasse koodiarenduse ja -toimetamise mudelisse ilma uue baidikoodi loomise ja JavaScripti keele muutmiseta. BinaryAST formaadis andmete suurus on v\u00f5rreldav kokku surutud minimeeritud JavaScript-koodiga, samas kui t\u00f6\u00f6tlemise kiirus suurendab oluliselt t\u00e4nu parsimisfaasi v\u00e4listamisele. Lisaks v\u00f5imaldab formaat kompileerida baidikoodi BinaryAST-i laadimise k\u00e4igus, ootamata k\u00f5igi andmete saamise l\u00f5petamist. Samuti v\u00f5imaldab serveripoolne parsimine v\u00e4listada BinaryAST-is kasutamata funktsioonid ja liigse koodi, millele brauseripoolse parsimise k\u00e4igus kulutatakse aega nii anal\u00fc\u00fcsimise kui ka liigse liikluse edastamise jaoks.<\/p>\n

BinaryAST-i omadus on ka v\u00f5imalus taastada loetav JavaScript, mis ei pruugi olla t\u00e4pselt sama, mis algne versioon, kuid on semantiliselt ekvivalentne ning sisaldab samu muutuja- ja funktsiooni nimesid (BinaryAST s\u00e4ilitab nimed, kuid mitte koodi positsioonide, vorminduse ja kommentaaride teavet). Teisest k\u00fcljest kutsub see esile uusi r\u00fcnnakusuundi, kuid arendajate arvates on need oluliselt v\u00e4iksemad ja kontrollitavamad kui alternatiivide kasutamisel, nagu n\u00e4iteks bytecode'i levitamine.<\/p>\n

Koodi testid facebook.com-is on n\u00e4idanud, et JavaScripti parsimiseks kulub 10-15% CPU ressurssidest ja parsimine v\u00f5tab rohkem aega kui bytecode'i genereerimine ja koodi esialgne koostamine JIT jaoks. SpiderMonkey mootoris kulub kogu AST loomisele 500-800 ms ning BinaryAST-i kasutamine on v\u00f5imaldanud seda aega v\u00e4hendada 70-90%.
\n\u00dcldiselt on suurema osa veebiraamistikest BinaryAST-i kasutamisel JavaScripti parsimise aeg 3-10% v\u00e4hem optimeerimisre\u017eiimis ja 90-97% v\u00f5rra, kui on sisse l\u00fclitatud mittetagasitevate funktsioonide ignoreerimise re\u017eiim.
\nTesti JavaScript komplekti, mille suurus on 1,2 MB, t\u00f6\u00f6tlemisel v\u00f5imaldas BinaryAST k\u00e4ivitamisaja kiirus t\u00f5sta lauaarvutil (Intel i7) 338 ms-lt 314 ms-le ja mobiilseadmel (HTC One M8) 2019 ms-lt 1455 ms-le.<\/p>\n

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

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

\u0418\u043d\u0436\u0435\u043d\u0435\u0440\u044b \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Cloudflare, Mozilla, Facebook \u0438 Bloomberg \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0439 \u0444\u043e\u0440\u043c\u0430\u0442 BinaryAST \u0434\u043b\u044f \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0430\u0432\u043a\u0438 \u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 JavaScript \u043a\u043e\u0434\u0430 \u043f\u0440\u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u0438\u0438 \u0441\u0430\u0439\u0442\u043e\u0432 \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435. 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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25564,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-33901","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Cloudflare, Mozilla ja Facebook arendavad BinaryAST-i JavaScripti laadimise kiirusel | ProHoster","description":"Cloudflare, Mozilla, Facebook ja Bloomberg insenerid on pakkunud v\u00e4lja uue BinaryAST formaadi, et kiirendada JavaScripti koodi edastamist ja t\u00f6\u00f6tlemist veebilehtede avamisel brauseris. BinaryAST viib s\u00fcntaktilise anal\u00fc\u00fcsi serverisse ja edastab juba vormitud abstraktse s\u00fcntaktilise puu (AST). Kui brauser saab BinaryAST, saab see kohe minna kompileerimise faasi, m\u00f6\u00f6da minnes JavaScripti l\u00e4htekoodi parsimisest.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/cloudflare-mozilla-i-facebook-razvivayut-binaryast-dlya-uskoreniya-zagruzki-javascript","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47Cloudflare, Mozilla \u0438 Facebook \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0442 BinaryAST \u0434\u043b\u044f \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u044f \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 JavaScript | ProHoster","og:description":"\u0418\u043d\u0436\u0435\u043d\u0435\u0440\u044b \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Cloudflare, Mozilla, Facebook \u0438 Bloomberg \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0439 \u0444\u043e\u0440\u043c\u0430\u0442 BinaryAST \u0434\u043b\u044f \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0430\u0432\u043a\u0438 \u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 JavaScript \u043a\u043e\u0434\u0430 \u043f\u0440\u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u0438\u0438 \u0441\u0430\u0439\u0442\u043e\u0432 \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435. 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