{"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\/ro\/blog\/news\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-quickjs","title":{"rendered":"Fondatorul QEMU \u0219i FFmpeg a publicat motorul JavaScript QuickJS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Matematicianul francez Fabrice Bellard, fondator al proiectelor QEMU \u0219i FFmpeg, care a creat cea mai rapid\u0103 formul\u0103 de calculare a num\u0103rului Pi \u0219i a dezvoltat un format de imagine <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=41198\">BPG<\/a><\/noindex>, a publicat prima versiune a noului motor JavaScript <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/\">QuickJS<\/a><\/noindex>. Motorul se distinge prin compactitate \u0219i este orientat spre integrarea \u00een alte sisteme. Codul proiectului este scris \u00een limbajul C \u0219i este distribuit sub licen\u021ba MIT. Este, de asemenea, disponibil\u0103 o versiune a motorului, compilat\u0103 \u00een WebAssembly cu ajutorul Emscripten, adecvat\u0103 pentru rulare \u00een browsere.<\/p>\n<p>Implementarea JavaScript <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/quickjs.html\">sus\u021bine<\/a><\/noindex> specifica\u021biei ES2019, inclusiv module, generatoare asincrone \u0219i proxys. Op\u021bional, sunt acceptate tipuri matematice neoficiale <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/jsbignum.html\">extensii<\/a><\/noindex> pentru JavaScript, cum ar fi tipurile BigInt \u0219i BigFloat, precum \u0219i <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\">supra\u00eenc\u0103rcarea operatorilor<\/a><\/noindex>. \u00cen ceea ce prive\u0219te performan\u021ba, QuickJS dep\u0103\u0219e\u0219te considerabil <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/bench.html\">omologii s\u0103i, de exemplu, \u00een testul<\/a><\/noindex> bench-v8, dep\u0103\u0219ind motorul<br \/>\n XS <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/Moddable-OpenSource\/moddable\">cu 35%,<\/a><\/noindex> DukTape <noindex><a rel=\"nofollow\" href=\"https:\/\/duktape.org\/\">de mai mult de dou\u0103 ori,<\/a><\/noindex> JerryScript <noindex><a rel=\"nofollow\" href=\"http:\/\/jerryscript.net\/\">de trei ori, iar<\/a><\/noindex> MuJS <noindex><a rel=\"nofollow\" href=\"https:\/\/mujs.com\/\">de \u0219apte ori.<\/a><\/noindex> Pe l\u00e2ng\u0103 biblioteca pentru integrarea motorului \u00een aplica\u021bii, proiectul ofer\u0103, de asemenea, un interpret qjs, care poate fi folosit pentru a rula cod JavaScript din linia de comand\u0103. Mai mult, este disponibil un compilator qjsc, capabil s\u0103 genereze fi\u0219iere executabile care pot fi rulate \u00een mod izolat, f\u0103r\u0103 dependen\u021be externe.<\/p>\n<p>Compactitate \u0219i u\u0219urin\u021b\u0103 \u00een integrarea \u00een alte proiecte. Codul include doar c\u00e2teva fi\u0219iere \u00een limbajul C, care nu necesit\u0103 dependen\u021be externe pentru compilare. Aplica\u021bia compilat\u0103 de baz\u0103 ocup\u0103 aproximativ 190 KB; <\/p>\n<p>Caracteristici principale:<\/p>\n<ul>\n<li class=\"l\"> Performan\u021b\u0103 foarte ridicat\u0103 \u0219i timp de ini\u021bializare redus. Rularea a 56 de mii de teste de compatibilitate cu ECMAScript dureaz\u0103 aproximativ 100 de secunde pe un singur nucleu de PC desktop obi\u0219nuit. Inicializarea runtime dureaz\u0103 mai pu\u021bin de 300 de microsecunde;\n<li class=\"l\"> Suport aproape complet pentru specifica\u021bia ES2019 \u0219i suport complet pentru aplica\u021bia \u201eB\u201d, care define\u0219te componentele pentru compatibilitatea cu aplica\u021biile web mai vechi;\n<li class=\"l\"> Suport aproape complet pentru specifica\u021bia ES2019 \u0219i suport complet pentru aplica\u021bia &#171;B&#187;, care define\u0219te componente pentru compatibilitatea cu vechile aplica\u021bii web;\n<li class=\"l\"> Suport pentru compilarea codului JavaScript \u00een fi\u0219iere executabile f\u0103r\u0103 dependen\u021be externe;\n<li class=\"l\"> Un colector de gunoi bazat pe num\u0103rarea referin\u021belor, f\u0103r\u0103 executarea cur\u0103\u021b\u0103rii ciclice, care a permis ob\u021binerea unui comportament predictibil \u0219i reducerea consumului de memorie;\n<li class=\"l\"> Un colector de gunoi bazat pe num\u0103rarea referin\u021belor, care evit\u0103 executarea ciclic\u0103 a cur\u0103\u021b\u0103rii, permi\u021b\u00e2nd astfel ob\u021binerea unui comportament predictibil \u0219i reducerea consumului de memorie;\n<li class=\"l\"> Pachet de extensii pentru calcule matematice \u00een limbajul JavaScript;\n<li class=\"l\"> O interfa\u021b\u0103 pentru execu\u021bia codului \u00een modul de linie de comand\u0103, care suport\u0103 sintax\u0103 colorat\u0103;\n<li class=\"l\"> O bibliotec\u0103 standard compact\u0103 cu leg\u0103turi la bibliotecile C.\n<\/ul>\n<p>Proiectul dezvolt\u0103 de asemenea trei biblioteci C asociate, folosite \u00een QuickJS \u0219i potrivite pentru utilizare separat\u0103: <\/p>\n<ul>\n<li class=\"l\"> libregexp &#8212; o implementare rapid\u0103 a expresiilor regulate, complet compatibile cu specifica\u021bia JavaScript ES 2019;\n<li class=\"l\"> libunicode &#8212; o bibliotec\u0103 compact\u0103 pentru lucrul cu Unicode;\n<li class=\"l\"> libbf &#8212; o implementare a opera\u021biunilor cu virgula mobil\u0103 de precizie arbitrar\u0103 \u0219i func\u021bii transcendentale cu rotunjire precis\u0103.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Sursa: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51079\">opennet.ro<\/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 5.0.2.1 - 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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