{"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\/no\/blog\/news\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-quickjs","title":{"rendered":"Grunnleggeren av QEMU og FFmpeg har publisert JavaScript-motoren QuickJS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Den franske matematikeren Fabrice Bellard, som en gang grunnla prosjektene QEMU og FFmpeg, samt skapte den raskeste formelen for beregning av tallet Pi og utviklet bildeformatet <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=41198\">BPG<\/a><\/noindex>, har publisert den f\u00f8rste utgaven av en ny JavaScript-motor. <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/\">QuickJS<\/a><\/noindex>Motoren er kompakt og designet for integrering i andre systemer. Koden til prosjektet er skrevet i C og distribueres under MIT-lisensen. Det finnes ogs\u00e5 en versjon av motoren som er kompilert til WebAssembly med Emscripten og er egnet for kj\u00f8ring i nettlesere.<\/p>\n<p>Implementeringen av JavaScript <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/quickjs.html\">Funksjon<\/a><\/noindex> spesifikasjonen ES2019, inkludert moduler, asynkrone generatorer og proxier. Valgfritt st\u00f8ttes ikke-standard matematiske <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/jsbignum.html\">utvidelse<\/a><\/noindex> funksjoner for JavaScript, som typene BigInt og BigFloat, samt <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\">operatoroverlasting<\/a><\/noindex>. N\u00e5r det gjelder ytelse, er QuickJS betydelig <noindex><a rel=\"nofollow\" href=\"https:\/\/bellard.org\/quickjs\/bench.html\">det eksisterende alternativene med<\/a><\/noindex> fremfor eksisterende alternativer; for eksempel i testen<br \/>\n bench-v8, overg\u00e5r motoren <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/Moddable-OpenSource\/moddable\">35%,<\/a><\/noindex> DukTape <noindex><a rel=\"nofollow\" href=\"https:\/\/duktape.org\/\">mer enn dobbelt,<\/a><\/noindex> JerryScript <noindex><a rel=\"nofollow\" href=\"http:\/\/jerryscript.net\/\">tre ganger, mens<\/a><\/noindex> MuJS <noindex><a rel=\"nofollow\" href=\"https:\/\/mujs.com\/\">syv ganger). Prosjektet tilbyr et bibliotek for \u00e5 integrere motoren, en qjs-tolk for \u00e5 kj\u00f8re JavaScript-kode fra kommandolinjen og en qjsc-kompilator for \u00e5 generere frittst\u00e5ende kj\u00f8rbare filer. Koden er skrevet i C og<\/a><\/noindex> med syv ganger.<\/p>\n<p>I tillegg til biblioteket for \u00e5 integrere motoren i applikasjoner tilbyr prosjektet ogs\u00e5 tolkeren qjs, som kan brukes til \u00e5 kj\u00f8re JavaScript-kode fra kommandolinjen. I tillegg er kompilatoren qjsc tilgjengelig, som er i stand til \u00e5 generere kj\u00f8rbare filer for isolert kj\u00f8ring, uten eksterne avhengigheter. <\/p>\n<p>Hovedfunksjoner:<\/p>\n<ul>\n<li class=\"l\"> Kompakt og enkelt \u00e5 integrere i andre prosjekter. Koden best\u00e5r kun av noen f\u00e5 filer i C, som ikke krever eksterne avhengigheter for kompilering. Det kompilert enkleste programmet tar omtrent 190 KB;\n<li class=\"l\"> Sv\u00e6rt h\u00f8y ytelse og kort oppstartstid. \u00c5 gjennoms\u00f8ke 56 000 tester for kompatibilitet med ECMAScript tar omtrent 100 sekunder n\u00e5r det kj\u00f8res p\u00e5 en vanlig stasjon\u00e6r PC med ett kjerner. Initialiseringen av runtime tar under 300 mikrosekunder;\n<li class=\"l\"> Nesten full st\u00f8tte for spesifikasjonen ES2019 og full st\u00f8tte for applikasjonen &#171;B&#187;, som definerer komponenter for kompatibilitet med eldre web-applikasjoner;\n<li class=\"l\"> Full gjennomf\u00f8ring av alle tester fra ECMAScript Test Suite;\n<li class=\"l\"> St\u00f8tte for kompilering av JavaScript-kode til kj\u00f8rbare filer uten eksterne avhengigheter;\n<li class=\"l\"> En s\u00f8ppeloppsamler basert p\u00e5 referansetelling uten syklisk utf\u00f8relse av opprydning, som har oppn\u00e5dd forutsigbart adferd og redusert minneforbruk;\n<li class=\"l\"> Et sett med utvidelser for matematiske beregninger p\u00e5 JavaScript;\n<li class=\"l\"> En kommandolinjeskall som st\u00f8tter syntaksutheving for kode;\n<li class=\"l\"> Et kompakt standardbibliotek med innpakninger over C-biblioteket.\n<\/ul>\n<p>Prosjektet utvikler ogs\u00e5 tre tilknyttede C-biblioteker, brukt i QuickJS og egnet for separat bruk: <\/p>\n<ul>\n<li class=\"l\"> libregexp &#8212; rask implementering av regul\u00e6re uttrykk, helt kompatibel med spesifikasjonen Javascript ES 2019;\n<li class=\"l\"> libunicode &#8212; kompakt bibliotek for arbeid med Unicode;\n<li class=\"l\"> libbf &#8212; implementering av operasjoner med flyttall av vilk\u00e5rlig presisjon og transcendentale funksjoner med n\u00f8yaktig avrunding.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Kilde: <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 5.0.5 - 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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