{"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\/es\/blog\/news\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-quickjs","title":{"rendered":"El fundador de QEMU y FFmpeg ha publicado el motor JavaScript QuickJS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>El matem\u00e1tico franc\u00e9s Fabrice Bellard, fundador de los proyectos QEMU y FFmpeg, adem\u00e1s de haber creado la f\u00f3rmula m\u00e1s r\u00e1pida para calcular el n\u00famero Pi y desarrollado un formato de imagen <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=41198\">BPG<\/a><\/noindex>, ha publicado la primera versi\u00f3n de un nuevo motor JavaScript <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/\">QuickJS<\/a><\/noindex>. El motor se distingue por su compacidad y est\u00e1 orientado a la integraci\u00f3n en otros sistemas. El c\u00f3digo del proyecto est\u00e1 escrito en C y se distribuye bajo la licencia MIT. Tambi\u00e9n est\u00e1 disponible una versi\u00f3n del motor compilada en WebAssembly con Emscripten, adecuada para ejecutarse en navegadores.<\/p>\n<p>La implementaci\u00f3n de JavaScript <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/quickjs.html\">soporta<\/a><\/noindex> incluye la especificaci\u00f3n ES2019, incluidos m\u00f3dulos, generadores as\u00edncronos y proxies. Opcionalmente, se admiten funciones matem\u00e1ticas no est\u00e1ndar <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/jsbignum.html\">la extensi\u00f3n<\/a><\/noindex> para JavaScript, como los tipos BigInt y BigFloat, as\u00ed como <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\">sobrecarga de operadores<\/a><\/noindex>. En t\u00e9rminos de rendimiento, QuickJS es significativamente <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/bench.html\">a<\/a><\/noindex> superior a sus equivalentes, por ejemplo, en la prueba<br \/>\n bench-v8, que supera al motor <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/Moddable-OpenSource\/moddable\">XS<\/a><\/noindex> por un 35%, <noindex><a rel=\"nofollow\" href=\"https:\/\/duktape.org\/\">DukTape<\/a><\/noindex> m\u00e1s de dos veces, <noindex><a rel=\"nofollow\" href=\"http:\/\/jerryscript.net\/\">JerryScript<\/a><\/noindex> tres veces, y <noindex><a rel=\"nofollow\" href=\"https:\/\/mujs.com\/\">MuJS<\/a><\/noindex> por siete veces.<\/p>\n<p>Adem\u00e1s de la biblioteca para integrar el motor en aplicaciones, el proyecto tambi\u00e9n ofrece un int\u00e9rprete qjs que puede usarse para ejecutar c\u00f3digo JavaScript desde la l\u00ednea de comandos. Adem\u00e1s, est\u00e1 disponible un compilador qjsc que puede generar archivos ejecutables listos para ejecutarse de forma aislada, sin dependencias externas. <\/p>\n<p>Caracter\u00edsticas principales:<\/p>\n<ul>\n<li class=\"l\"> Compacidad y facilidad de integraci\u00f3n en otros proyectos. El c\u00f3digo consta de solo unos pocos archivos en C que no requieren dependencias externas para la compilaci\u00f3n. Una aplicaci\u00f3n m\u00ednima compilada ocupa alrededor de 190 KB;\n<li class=\"l\"> Rendimiento extremadamente alto y bajo tiempo de arranque. La ejecuci\u00f3n de 56,000 pruebas de compatibilidad con ECMAScript lleva alrededor de 100 segundos en un n\u00facleo de una PC de escritorio convencional. La inicializaci\u00f3n del runtime toma menos de 300 microsegundos;\n<li class=\"l\"> Casi completo soporte para la especificaci\u00f3n ES2019 y soporte total para la aplicaci\u00f3n &#171;B&#187;, que define componentes para la compatibilidad con aplicaciones web antiguas;\n<li class=\"l\"> Cumplimiento completo de todas las pruebas del conjunto de ECMAScript Test Suite;\n<li class=\"l\"> Soporte para compilar c\u00f3digo JavaScript en archivos ejecutables sin dependencias externas;\n<li class=\"l\"> Un recolector de basura basado en conteo de referencias sin limpieza c\u00edclica, que ha permitido lograr un comportamiento predecible y reducir el consumo de memoria;\n<li class=\"l\"> Un conjunto de extensiones para c\u00e1lculos matem\u00e1ticos en JavaScript;\n<li class=\"l\"> Interfaz para ejecutar c\u00f3digo en modo de l\u00ednea de comandos, que soporta la resaltaci\u00f3n de sintaxis;\n<li class=\"l\"> Biblioteca est\u00e1ndar compacta con envolturas sobre la biblioteca C.\n<\/ul>\n<p>El proyecto tambi\u00e9n desarrolla tres bibliotecas C auxiliares, utilizadas en QuickJS y adecuadas para aplicaciones independientes: <\/p>\n<ul>\n<li class=\"l\"> libregexp \u2014 implementaci\u00f3n r\u00e1pida de expresiones regulares, completamente compatible con la especificaci\u00f3n de Javascript ES 2019;\n<li class=\"l\"> libunicode \u2014 biblioteca compacta para trabajar con Unicode;\n<li class=\"l\"> libbf \u2014 implementaci\u00f3n de operaciones de punto flotante de precisi\u00f3n arbitraria y funciones trascendentales con redondeo exacto.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fuente: <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 5.0.3 - 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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imagen","canonical_url":"https:\/\/prohoster.info\/es\/blog\/news\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-quickjs","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"es_ES","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\udd47\u041e\u0441\u043d\u043e\u0432\u0430\u0442\u0435\u043b\u044c QEMU \u0438 FFmpeg \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b JavaScript-\u0434\u0432\u0438\u0436\u043e\u043a QuickJS | ProHoster","og:description":"\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a 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