{"id":143780,"date":"2025-09-18T11:11:56","date_gmt":"2025-09-18T09:11:56","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opublikovan-standart-webassembly-3-0"},"modified":"2025-09-18T11:11:56","modified_gmt":"2025-09-18T09:11:56","slug":"opublikovan-standart-webassembly-3-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/opublikovan-standart-webassembly-3-0","title":{"rendered":"Byl zve\u0159ejn\u011bn standard WebAssembly 3.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Konsorcium W3C ozn\u00e1milo dokon\u010den\u00ed specifikace standardizuj\u00edc\u00ed mezik\u00f3d WebAssembly 3.0 a souvisej\u00edc\u00ed API, kter\u00e9 umo\u017e\u0148uje vytv\u00e1\u0159et vysoce v\u00fdkonn\u00e9 aplikace p\u0159enosn\u00e9 mezi prohl\u00ed\u017ee\u010di a hardwarov\u00fdmi platformami. WebAssembly poskytuje nez\u00e1visl\u00fd na prohl\u00ed\u017ee\u010di univerz\u00e1ln\u00ed n\u00edzko\u00farov\u0148ov\u00fd mezik\u00f3d pro prov\u00e1d\u011bn\u00ed aplikac\u00ed p\u0159elo\u017een\u00fdch z r\u016fzn\u00fdch programovac\u00edch jazyk\u016f.      <\/p>\n<p>Technologie WebAssembly m\u016f\u017ee b\u00fdt pou\u017eita k prov\u00e1d\u011bn\u00ed ve webov\u00e9m prohl\u00ed\u017ee\u010di \u00faloh vy\u017eaduj\u00edc\u00edch vysok\u00fd v\u00fdkon, nap\u0159\u00edklad k\u00f3dov\u00e1n\u00ed videa, zpracov\u00e1n\u00ed zvuku, manipulaci s grafikou a 3D, v\u00fdvoji her, kryptografick\u00fdm operac\u00edm a matematick\u00fdm v\u00fdpo\u010dt\u016fm prost\u0159ednictv\u00edm organizace prov\u00e1d\u011bn\u00ed k\u00f3du napsan\u00e9ho v kompilovan\u00fdch jazyc\u00edch, jako je C\/C++. D\u00edky vyu\u017eit\u00ed JIT pro WebAssembly lze dos\u00e1hnout \u00farovn\u011b v\u00fdkonu bl\u00edzk\u00e9 nativn\u00edmu k\u00f3du.    <\/p>\n<p>Mezi hlavn\u00ed \u00fakoly WebAssembly pat\u0159\u00ed zaji\u0161t\u011bn\u00ed p\u0159enositelnosti, p\u0159edv\u00eddatelnosti chov\u00e1n\u00ed a identity prov\u00e1d\u011bn\u00ed k\u00f3du na r\u016fzn\u00fdch platform\u00e1ch. WebAssembly nen\u00ed omezeno na prohl\u00ed\u017ee\u010de a tak\u00e9 se prosazuje jako univerz\u00e1ln\u00ed platforma pro bezpe\u010dn\u00e9 prov\u00e1d\u011bn\u00ed k\u00f3du v jak\u00fdchkoli infrastruktur\u00e1ch, opera\u010dn\u00edch syst\u00e9mech a za\u0159\u00edzen\u00edch.    <\/p>\n<p>K dispozici jsou n\u00e1sleduj\u00edc\u00ed specifikace:  <\/p>\n<ul>\n<li class=\"l\"> WebAssembly Core \u2014 popisuje n\u00edzko\u00farov\u0148ov\u00fd virtu\u00e1ln\u00ed stroj pro vykon\u00e1v\u00e1n\u00ed mezik\u00f3du WebAssembly. Souvisej\u00edc\u00ed zdroje WebAssembly jsou dod\u00e1v\u00e1ny ve form\u00e1tu &#171;.wasm&#187;, podobn\u00e9m soubor\u016fm &#171;.class&#187; v Jav\u011b a obsahuj\u00ed statick\u00e1 data a segmenty k\u00f3du pro pr\u00e1ci s t\u011bmito daty.   <\/li>\n<li class=\"l\"> WebAssembly JavaScript API \u2014 poskytuje API pro integraci s JavaScriptem. Umo\u017e\u0148uje z\u00edskat hodnoty a p\u0159ed\u00e1vat parametry do funkc\u00ed WebAssembly. Spu\u0161t\u011bn\u00ed WebAssembly odpov\u00edd\u00e1 bezpe\u010dnostn\u00edmu modelu JavaScriptu a ve\u0161ker\u00e1 interakce se z\u00e1kladn\u00edm syst\u00e9mem prob\u00edh\u00e1 analogicky k vykon\u00e1v\u00e1n\u00ed k\u00f3du JavaScriptu.\n<li class=\"l\">  WebAssembly Web API \u2014 definuje programov\u00e9 rozhran\u00ed zalo\u017een\u00e9 na mechanismu Promise pro po\u017eadov\u00e1n\u00ed a vykon\u00e1v\u00e1n\u00ed zdroj\u016f &#171;.wasm&#187;. Form\u00e1t zdroj\u016f WebAssembly je optimalizov\u00e1n pro zah\u00e1jen\u00ed vykon\u00e1v\u00e1n\u00ed, ani\u017e by bylo t\u0159eba \u010dekat na \u00fapln\u00e9 na\u010dten\u00ed souboru, co\u017e zvy\u0161uje reaktivitu webov\u00fdch aplikac\u00ed.\n<li class=\"l\"> WASI API \u2014 definuje modul\u00e1rn\u00ed syst\u00e9mov\u00e9 rozhran\u00ed pro spu\u0161t\u011bn\u00ed WebAssembly mimo prohl\u00ed\u017ee\u010de a poskytuje p\u0159\u00edstup k takov\u00fdm zdroj\u016fm, jako jsou soubory, s\u00ed\u0165ov\u00e1 p\u0159ipojen\u00ed, gener\u00e1tor pseudon\u00e1hodn\u00fdch \u010d\u00edsel a syst\u00e9mov\u00e9 hodiny.    <\/ul>\n<p>Je zaznamen\u00e1no, \u017ee v nov\u00e9 verzi standardu byla v\u00fdrazn\u011b zlep\u0161ena podpora kompilace vysokolevelov\u00fdch jazyk\u016f do WebAssembly. Nap\u0159\u00edklad byla implementov\u00e1na mo\u017enost kompilace projekt\u016f v jazyc\u00edch Java, OCaml, Scala, Kotlin, Scheme a Dart. Hlavn\u00ed zm\u011bny ve WebAssembly 3.0, ve srovn\u00e1n\u00ed s druhou verz\u00ed standardu:    <\/p>\n<ul>\n<li class=\"l\"> Byla implementov\u00e1na podpora 64bitov\u00e9ho adresn\u00edho prostoru. Pro adresaci pam\u011bti nyn\u00ed m\u016f\u017ee b\u00fdt pou\u017eit typ i64, nikoli pouze i32, co\u017e roz\u0161i\u0159uje dostupn\u00fd adresn\u00ed prostor pro aplikace ze 4 GB na 16 EB (p\u0159i prov\u00e1d\u011bn\u00ed v prohl\u00ed\u017ee\u010di je omezen\u00ed na 16 GB).\n<li class=\"l\"> Byla poskytnuta mo\u017enost soub\u011b\u017en\u00e9ho pou\u017eit\u00ed v\u00edce objekt\u016f pam\u011bti v jednom modulu WebAssembly a pr\u00e1ce s r\u016fzn\u00fdmi adresn\u00edmi prostory. Mimo jin\u00e9 je mo\u017en\u00e9 kop\u00edrovat data mezi r\u016fzn\u00fdmi instancemi objekt\u016f pam\u011bti um\u00edst\u011bn\u00fdmi v r\u016fzn\u00fdch adresn\u00edch prostorech.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora garbage collection. Krom\u011b d\u0159\u00edve dostupn\u00e9 line\u00e1rn\u00ed pam\u011bti byl nab\u00edzen samostatn\u00fd typ \u00falo\u017ei\u0161t\u011b, kter\u00e9 je automaticky spravov\u00e1no pomoc\u00ed garbage collectoru. Kompil\u00e1tor nyn\u00ed m\u016f\u017ee pou\u017e\u00edvat odd\u011blen\u00e9 datov\u00e9 struktury, pole a prom\u011bnn\u00e9, za jejich\u017e alokaci pam\u011bti a spr\u00e1vu \u017eivotn\u00edho cyklu odpov\u00edd\u00e1 WebAssembly.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora typovan\u00fdch odkaz\u016f, kter\u00e9 mohou popisovat p\u0159esnou strukturu hodnoty, na kterou odkaz ukazuje, co\u017e umo\u017e\u0148uje vyhnout se dodate\u010dn\u00fdm kontrol\u00e1m b\u011bhem b\u011bhu. Podporov\u00e1ny jsou podtypy, rekurze typ\u016f a mo\u017enost bezpe\u010dn\u00e9ho pou\u017e\u00edv\u00e1n\u00ed odkaz\u016f na funkce, kter\u00e9 nevy\u017eaduj\u00ed kontrolu typ\u016f a hranic b\u011bhem b\u011bhu.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora tail call, p\u0159i kter\u00e9 aktu\u00e1ln\u00ed funkce okam\u017eit\u011b ukon\u010duje prov\u00e1d\u011bn\u00ed po vol\u00e1n\u00ed jin\u00e9 funkce, ani\u017e by spot\u0159ebovala m\u00edsto na z\u00e1sobn\u00edku.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora zpracov\u00e1n\u00ed v\u00fdjimek.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora \u201eoslaben\u00fdch\u201c (relaxed) vektorov\u00fdch SIMD instrukc\u00ed, kter\u00e9 umo\u017e\u0148uj\u00ed dos\u00e1hnout vy\u0161\u0161\u00ed \u00fa\u010dinnosti t\u00edm, \u017ee se vzd\u00e1vaj\u00ed p\u0159\u00edsn\u00e9ho dodr\u017eov\u00e1n\u00ed s\u00e9mantiky na v\u0161ech hardwarov\u00fdch platform\u00e1ch.\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora deterministick\u00e9ho profilu vykon\u00e1v\u00e1n\u00ed, kter\u00fd ur\u010duje platform\u011b nez\u00e1visl\u00e9 chov\u00e1n\u00ed pro instrukce, jejich\u017e v\u00fdsledky se mohou li\u0161it na r\u016fzn\u00fdch platform\u00e1ch (operace s plovouc\u00ed desetinnou \u010d\u00e1rkou, vracen\u00ed hodnoty NaN, oslaben\u00e9 vektorov\u00e9 instrukce). P\u0159i v\u00fdb\u011bru tohoto profilu poskytuje Wasm deterministick\u00e9 chov\u00e1n\u00ed, reprodukovatelnost a p\u0159enositelnost.\n<li class=\"l\"> Byla p\u0159id\u00e1na syntaxe pro vytv\u00e1\u0159en\u00ed vlastn\u00edch anotac\u00ed, kter\u00e9 umo\u017e\u0148uj\u00ed p\u0159ipojit dodate\u010dn\u00e9 informace k\u00a0k\u00f3du WebAssembly. D\u0159\u00edve byla podpora u\u017eivatelsk\u00fdch sekc\u00ed, kter\u00e9 umo\u017e\u0148ovaly ukl\u00e1dat libovoln\u00e9 informace, dostupn\u00e1 v\u00a0bin\u00e1rn\u00edm form\u00e1tu WebAssembly, ale chyb\u011bla v\u00a0textov\u00e9m form\u00e1tu WebAssembly. Nyn\u00ed je mo\u017en\u00e9 p\u0159id\u00e1vat tyto informace ve \u010diteln\u00e9 a editovateln\u00e9 podob\u011b.\n<li class=\"l\"> Do API JavaScriptu byly p\u0159id\u00e1ny vestav\u011bn\u00e9 funkce pro pr\u00e1ci s\u00a0\u0159et\u011bzci. D\u0159\u00edve bylo mo\u017en\u00e9 p\u0159ed\u00e1vat \u0159et\u011bzce JavaScriptu do WebAssembly pouze jako extern\u00ed odkazy, nyn\u00ed je mo\u017en\u00e9 p\u0159\u00edmo p\u0159istupovat k\u00a0\u0159et\u011bzc\u016fm a manipulovat s\u00a0nimi uvnit\u0159 WebAssembly.      <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63899\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043d\u0441\u043e\u0440\u0446\u0438\u0443\u043c W3C \u043e\u0431\u044a\u044f\u0432\u0438\u043b \u043e \u0433\u043e\u0442\u043e\u0432\u043d\u043e\u0441\u0442\u0438 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438, \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0438\u0437\u0438\u0440\u0443\u044e\u0449\u0435\u0439 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u044b\u0439 \u043a\u043e\u0434 WebAssembly 3.0 \u0438 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0439 \u0441 \u043d\u0438\u043c API, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0441\u043e\u0437\u0434\u0430\u0432\u0430\u0442\u044c \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f, \u043f\u0435\u0440\u0435\u043d\u043e\u0441\u0438\u043c\u044b\u0435 \u043c\u0435\u0436\u0434\u0443 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430\u043c\u0438 \u0438 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u044b\u043c\u0438 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\u043c\u0438. WebAssembly \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u043d\u0435 \u0437\u0430\u0432\u0438\u0441\u044f\u0449\u0438\u0439 \u043e\u0442 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0439 \u043d\u0438\u0437\u043a\u043e\u0443\u0440\u043e\u0432\u043d\u0435\u0432\u044b\u0439 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u044b\u0439 \u043a\u043e\u0434 \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439, \u0441\u043a\u043e\u043c\u043f\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u044f\u0437\u044b\u043a\u043e\u0432 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f. \u0422\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f WebAssembly \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 \u0437\u0430\u0434\u0430\u0447, \u0442\u0440\u0435\u0431\u0443\u044e\u0449\u0438\u0445 \u0432\u044b\u0441\u043e\u043a\u043e\u0439 [&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-143780","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=\"\u041a\u043e\u043d\u0441\u043e\u0440\u0446\u0438\u0443\u043c W3C \u043e\u0431\u044a\u044f\u0432\u0438\u043b \u043e 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