{"id":36081,"date":"2019-10-31T22:09:30","date_gmt":"2019-10-31T19:09:30","guid":{"rendered":"https:\/\/prohoster.info\/blog\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-quickjs\/"},"modified":"2019-10-31T22:09:30","modified_gmt":"2019-10-31T19:09:30","slug":"osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-quickjs","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-quickjs","title":{"rendered":"Osniva\u010d QEMU i FFmpeg objavio je JavaScript motor QuickJS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Francuski matemati\u010dar Fabrice Bellard, koji je osnovao projekte QEMU i FFmpeg, kao i stvorio najbr\u017eu formulu za izra\u010dunavanje broja Pi i razvio format slika <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=41198\">BPG<\/a><\/noindex>, objavio je prvi broj novog JavaScript engine-a <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/\">QuickJS<\/a><\/noindex>. Engine se odlikuje kompaktno\u0161\u0107u i namijenjen je ugradnji u druge sustave. Kod projekta napisan je na jeziku C i distribuiran je pod MIT licencom. Tako\u0111er je dostupna verzija engine-a koja je kompajlirana u WebAssembly uz pomo\u0107 Emscriptena i pogodna je za izvr\u0161avanje u preglednicima.<\/p>\n<p>Implementacija JavaScript <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/quickjs.html\">podr\u017eava<\/a><\/noindex> specifikacije ES2019, uklju\u010duju\u0107i module, asinhrone generatore i proxy. Opcionalno podr\u017eava nestandardne matemati\u010dke <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/jsbignum.html\">ekstenzije<\/a><\/noindex> tipove BigInt i BigFloat, kao i <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%9F%D0%B5%D1%80%D0%B5%D0%B3%D1%80%D1%83%D0%B7%D0%BA%D0%B0_%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%82%D0%BE%D1%80%D0%BE%D0%B2\">preoptere\u0107enje operatora<\/a><\/noindex>. U pogledu performansi, QuickJS zna\u010dajno <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/bench.html\">nadma\u0161uje<\/a><\/noindex> postoje\u0107e analoge, primjerice, u testu<br \/>\n bench-v8 nadma\u0161uje engine <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/Moddable-OpenSource\/moddable\">XS<\/a><\/noindex> za 35%, <noindex><a rel=\"nofollow\" href=\"https:\/\/duktape.org\/\">DukTape<\/a><\/noindex> vi\u0161e od dva puta, <noindex><a rel=\"nofollow\" href=\"http:\/\/jerryscript.net\/\">JerryScript<\/a><\/noindex> tri puta, a <noindex><a rel=\"nofollow\" href=\"https:\/\/mujs.com\/\">MuJS<\/a><\/noindex> sedam puta.<\/p>\n<p>Osim biblioteke za ugradnju engine-a u aplikacije, projekt nudi i interpreter qjs, koji se mo\u017ee koristiti za pokretanje JavaScript koda iz komandne linije. \u0160tovi\u0161e, dostupan je i kompajler qjsc, sposoban generirati izvr\u0161ne datoteke pogodne za samostalno pokretanje, bez vanjskih ovisnosti. <\/p>\n<p>Glavne zna\u010dajke:<\/p>\n<ul>\n<li class=\"l\"> Kompaktno\u0107a i jednostavnost ugradnje u druge projekte. Kod uklju\u010duje samo nekoliko datoteka na jeziku C, ne zahtijevaju\u0107i vanjske ovisnosti za kompilaciju. Skompilirana najjednostavnija aplikacija zauzima oko 190 Kb;\n<li class=\"l\"> Veoma visoke performanse i kratko vrijeme pokretanja. Prolazak od 56 tisu\u0107a testova kompatibilnosti s ECMAScriptom traje oko 100 sekundi kada se izvr\u0161ava na jednom jerdru obi\u010dnog stolnog ra\u010dunala. Inicijalizacija runtime-a traje manje od 300 mikrosekundi;\n<li class=\"l\"> Sk nearly complete support for the ES2019 specification and full support for the application &#171;B&#187;, which defines components for compatibility with older web applications;\n<li class=\"l\"> Potpuno prolazak svih testova iz skupa ECMAScript Test Suite;\n<li class=\"l\"> Podr\u0161ka za kompilaciju koda na jeziku Javascript u izvr\u0161ne datoteke bez vanjskih ovisnosti;\n<li class=\"l\"> Sakuplja\u010d sme\u0107a temeljen na brojanju referenci bez cikli\u010dkog \u010di\u0161\u0107enja, \u0161to je omogu\u0107ilo postizanje predvidljivog pona\u0161anja i smanjenje potro\u0161nje memorije;\n<li class=\"l\"> Skup ekstenzija za matemati\u010dke izra\u010dune na jeziku JavaScript;\n<li class=\"l\"> Okru\u017eenje za izvr\u0161avanje koda u komandnoj liniji koje podr\u017eava isticanje sintakse;\n<li class=\"l\"> Kompaktna standardna biblioteka s obradama iz C biblioteke.\n<\/ul>\n<p>Projekat tako\u0111e razvija tri prate\u0107e C biblioteke, kori\u0161\u0107ene u QuickJS-u i prikladne za samostalnu primenu: <\/p>\n<ul>\n<li class=\"l\"> libregexp \u2014 brza implementacija regularnih izraza, potpuno kompatibilna sa specifikacijom Javascript ES 2019;\n<li class=\"l\"> libunicode \u2014 kompaktna biblioteka za rad s Unicode;\n<li class=\"l\"> libbf \u2014 implementacija operacija s pomi\u010dnom to\u010dkom proizvoljne preciznosti i transcendentnih funkcija s to\u010dnim zaokru\u017eenjem.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Izvor: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51079\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a \u0424\u0430\u0431\u0440\u0438\u0441 \u0411\u0435\u043b\u043b\u0430\u0440 (Fabrice Bellard), \u043e\u0441\u043d\u043e\u0432\u0430\u0432\u0448\u0438\u0439 \u0432 \u0441\u0432\u043e\u0435 \u0432\u0440\u0435\u043c\u044f \u043f\u0440\u043e\u0435\u043a\u0442\u044b QEMU \u0438 FFmpeg, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0441\u043e\u0437\u0434\u0430\u0432\u0448\u0438\u0439 \u0441\u0430\u043c\u0443\u044e \u0431\u044b\u0441\u0442\u0440\u0443\u044e \u0444\u043e\u0440\u043c\u0443\u043b\u0443 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f \u0447\u0438\u0441\u043b\u0430 \u041f\u0438 \u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u0432\u0448\u0438\u0439 \u0444\u043e\u0440\u043c\u0430\u0442 \u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0439 BPG, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043d\u043e\u0432\u043e\u0433\u043e JavaScript-\u0434\u0432\u0438\u0436\u043a\u0430 QuickJS. \u0414\u0432\u0438\u0436\u043e\u043a \u043e\u0442\u043b\u0438\u0447\u0430\u0435\u0442\u0441\u044f \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u043e\u0441\u0442\u044c\u044e \u0438 \u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d \u043d\u0430 \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u043d\u0438\u0435 \u0432 \u0434\u0440\u0443\u0433\u0438\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438 \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 MIT. [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-36081","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a \u0424\u0430\u0431\u0440\u0438\u0441 \u0411\u0435\u043b\u043b\u0430\u0440 (Fabrice Bellard), \u043e\u0441\u043d\u043e\u0432\u0430\u0432\u0448\u0438\u0439 \u0432 \u0441\u0432\u043e\u0435 \u0432\u0440\u0435\u043c\u044f \u043f\u0440\u043e\u0435\u043a\u0442\u044b QEMU \u0438 FFmpeg, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0441\u043e\u0437\u0434\u0430\u0432\u0448\u0438\u0439 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