{"id":152471,"date":"2025-12-23T23:12:03","date_gmt":"2025-12-23T21:12:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-micro-quickjs"},"modified":"2025-12-23T23:12:03","modified_gmt":"2025-12-23T21:12:03","slug":"osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-micro-quickjs","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-micro-quickjs","title":{"rendered":"Fondatorul QEMU \u0219i FFmpeg a publicat motorul JavaScript Micro QuickJS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Matematicianul francez Fabrice Bellard, fondator al proiectelor QEMU, FFmpeg, BPG, QuickJS, TinyGL \u0219i TinyCC, a publicat un nou motor JavaScript pentru sisteme embeddate \u2014 Micro QuickJS, capabil s\u0103 compileze \u0219i s\u0103 execute programe JavaScript, consum\u00e2nd doar 10 KB de RAM. \u00cempreun\u0103 cu biblioteca C, motorul ocup\u0103 aproximativ 100 KB de memorie permanent\u0103. Compilarea JavaScript \u00een bytecode \u0219i execu\u021bia separat\u0103 a bytecode-ului sunt posibile. Codul proiectului este scris \u00een C \u0219i este distribuit sub licen\u021ba MIT. <\/p>\n

Motorul suport\u0103 un subset al limbajului JavaScript, apropiat de specifica\u021bia ECMAScript 5 (ES2019), dar impune cerin\u021be mai stricte asupra codului \u0219i nu permite utilizarea unor construc\u021bii JavaScript ineficiente sau care pot provoca erori. De exemplu, variabilele globale trebuie neap\u0103rat declarate cu cuv\u00e2ntul cheie \u201evar\u201d, utilizarea \u201ewith\u201d este interzis\u0103, array-urile nu pot avea elemente lips\u0103, iar ini\u021bializarea la declararea tipului \u201enew Number(1)\u201d nu este posibil\u0103, av\u00e2nd \u00een vedere c\u0103 accesul la variabilele locale din eval este imposibil. <\/p>\n

Performan\u021ba Micro QuickJS este aproape de motorul QuickJS, dezvoltat de Fabrice din 2019. Micro QuickJS utilizeaz\u0103 o parte din codul motorului QuickJS, dar arhitectura este \u00een mare parte diferit\u0103 \u0219i este proiectat\u0103 pentru un consum minim de memorie. De exemplu, Micro QuickJS folose\u0219te un colector de gunoi de tip reclam\u0103, \u00een timp ce QuickJS utilizeaz\u0103 num\u0103rarea referin\u021belor. Costurile suplimentare ale colectorului de gunoi sunt de doar c\u00e2\u021biva bi\u021bi pentru fiecare bloc de memorie alocat. Pentru alocarea memoriei, se folose\u0219te un allocator propriu, independent de func\u021bia de bibliotec\u0103 malloc(). <\/p>\n

Alte diferen\u021be fa\u021b\u0103 de QuickJS: nu folose\u0219te stiv\u0103 ma\u0219in\u0103 virtual\u0103<\/a>; o reprezentare intern\u0103 diferit\u0103 a obiectelor; stocarea \u0219irurilor \u00een codificarea UTF-8; generarea bibliotecii standard \u00een timpul compil\u0103rii \u0219i stocarea acesteia \u00een memorie permanent\u0103 cu crearea \u00een RAM a doar c\u00e2torva obiecte; un parser similar cu QuickJS, dar f\u0103r\u0103 utilizarea recursiei; combinarea \u00eentr-o singur\u0103 trecere a gener\u0103rii bytecode-ului \u0219i a optimiz\u0103rii (\u00een QuickJS exist\u0103 mai multe treceri pentru optimizare).
\n
Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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\u0451 \u0432\u0440\u0435\u043c\u044f \u043f\u0440\u043e\u0435\u043a\u0442\u044b QEMU, FFmpeg, BPG, QuickJS, TinyGL \u0438 TinyCC, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043d\u043e\u0432\u044b\u0439 JavaScript-\u0434\u0432\u0438\u0436\u043e\u043a \u0434\u043b\u044f \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c — Micro QuickJS, \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u044b\u0439 \u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c JavaScript-\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b, \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u044f\u044f \u0432\u0441\u0435\u0433\u043e 10 \u041a\u0411 \u041e\u0417\u0423. \u0412\u043c\u0435\u0441\u0442\u0435 \u0441 \u0421\u0438-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u043e\u0439 \u0434\u0432\u0438\u0436\u043e\u043a \u0437\u0430\u043d\u0438\u043c\u0430\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e 100 \u041a\u0411 \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438. \u0412\u043e\u0437\u043c\u043e\u0436\u043d\u0430 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u044f JavaScript \u0432 \u0431\u0430\u0439\u0442\u043a\u043e\u0434 \u0438 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0439 \u0437\u0430\u043f\u0443\u0441\u043a […]<\/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-152471","post","type-post","status-publish","format-standard","hentry","category-news"],"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\udd47Fondatorul QEMU \u0219i FFmpeg a publicat motorul JavaScript Micro QuickJS | ProHoster","description":"Matematicianul francez Fabrice Bellard, fondator al proiectelor QEMU, FFmpeg, BPG, QuickJS, TinyGL \u0219i TinyCC, a publicat un nou motor JavaScript pentru sisteme integrate - 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