{"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\/pl\/blog\/news\/osnovatel-qemu-i-ffmpeg-opublikoval-javascript-dvizhok-micro-quickjs","title":{"rendered":"Za\u0142o\u017cyciel QEMU i FFmpeg opublikowa\u0142 silnik JavaScript Micro QuickJS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Francuski matematyk Fabrice Bellard, tw\u00f3rca projekt\u00f3w QEMU, FFmpeg, BPG, QuickJS, TinyGL i TinyCC, opublikowa\u0142 nowy silnik JavaScript dla system\u00f3w wbudowanych \u2014 Micro QuickJS, kt\u00f3ry jest w stanie kompilowa\u0107 i uruchamia\u0107 programy JavaScript, wykorzystuj\u0105c tylko 10 KB pami\u0119ci RAM. Wraz z bibliotek\u0105 w j\u0119zyku C, silnik zajmuje oko\u0142o 100 KB pami\u0119ci sta\u0142ej. Mo\u017cliwa jest kompilacja JavaScript do kodu bajtowego oraz oddzielne uruchamianie tego kodu. Kod projektu napisany jest w j\u0119zyku C i jest udost\u0119pniany na licencji MIT. <\/p>\n

Silnik obs\u0142uguje podzbi\u00f3r j\u0119zyka JavaScript, zbli\u017cony do specyfikacji ECMAScript 5 (ES2019), ale stawia bardziej rygorystyczne wymagania wobec kodu i nie pozwala na u\u017cycie nieefektywnych lub b\u0142\u0119dnych konstrukcji JavaScript. Na przyk\u0142ad zmienne globalne musz\u0105 by\u0107 deklarowane za pomoc\u0105 s\u0142owa kluczowego \u201evar\u201d, zabronione jest u\u017cycie \u201ewith\u201d, tablice nie mog\u0105 mie\u0107 luk, a inicjalizacja przy deklaracji w formie \u201enew Number(1)\u201d jest niemo\u017cliwa; z eval nie mo\u017cna uzyska\u0107 dost\u0119pu do zmiennych lokalnych. <\/p>\n

Wydajno\u015b\u0107 Micro QuickJS jest zbli\u017cona do silnika QuickJS, rozwijanego przez Fabrice'a od 2019 roku. W Micro QuickJS wykorzystano cz\u0119\u015b\u0107 kodu z silnika QuickJS, ale architektura r\u00f3\u017cni si\u0119 w du\u017cym stopniu i zosta\u0142a zaprojektowana z my\u015bl\u0105 o minimalnym zu\u017cyciu pami\u0119ci. Na przyk\u0142ad w Micro QuickJS zastosowano trasuj\u0105cy zbieracz \u015bmieci, podczas gdy w QuickJS u\u017cyto liczenia referencji. Narzut zbieracza \u015bmieci wynosi zaledwie kilka bit\u00f3w na ka\u017cdy przydzielony blok pami\u0119ci. Do alokacji pami\u0119ci u\u017cywany jest w\u0142asny alokator, niezale\u017cny od funkcji malloc(). <\/p>\n

Inne r\u00f3\u017cnice w por\u00f3wnaniu do QuickJS: brak u\u017cywania stosu maszyna wirtualna<\/a>; inne wewn\u0119trzne przedstawienie obiekt\u00f3w; przechowywanie ci\u0105g\u00f3w w kodowaniu UTF-8; generacja standardowej biblioteki w czasie kompilacji i jej przechowywanie w pami\u0119ci sta\u0142ej z tworzeniem w pami\u0119ci RAM zaledwie kilku obiekt\u00f3w; parser bliski QuickJS, ale nie korzystaj\u0105cy z rekurencji; po\u0142\u0105czenie w jednym przebiegu generacji kodu bajtowego i optymalizacji (w QuickJS jest kilka przebieg\u00f3w optymalizacji).
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/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\udd47Za\u0142o\u017cyciel QEMU i FFmpeg opublikowa\u0142 silnik JavaScript Micro QuickJS | ProHoster","description":"Francuski matematyk Fabrice Bellard, kt\u00f3ry w swoim czasie za\u0142o\u017cy\u0142 projekty QEMU, FFmpeg, BPG, QuickJS, TinyGL i TinyCC, opublikowa\u0142 nowy silnik JavaScript dla system\u00f3w wbudowanych - 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