{"id":53635,"date":"2019-12-06T00:00:00","date_gmt":"2019-12-05T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/w3c-pridal-webassembly-status-rekomendovannogo-standarta"},"modified":"2020-02-18T14:01:34","modified_gmt":"2020-02-18T11:01:34","slug":"w3c-pridal-webassembly-status-rekomendovannogo-standarta","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/w3c-pridal-webassembly-status-rekomendovannogo-standarta","title":{"rendered":"W3C ha conferito a WebAssembly lo status di standard raccomandato","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Consorzio W3C <noindex><a rel=\"nofollow\" href=\"https:\/\/www.w3.org\/blog\/news\/archives\/8123\">ha annunciato<\/a><\/noindex> per l'assegnazione della tecnologia WebAssembly come standard raccomandato. WebAssembly fornisce un codice intermedio universale a basso livello indipendente dal browser per l'esecuzione di applicazioni compilate da diversi linguaggi di programmazione. WebAssembly \u00e8 posizionato come una tecnologia pi\u00f9 promettente e portabile per la creazione di applicazioni web ad alte prestazioni. WebAssembly pu\u00f2 essere utilizzato per affrontare attivit\u00e0 che richiedono elevate prestazioni, come la codifica video, l'elaborazione audio, la manipolazione grafica e 3D, lo sviluppo di giochi, operazioni crittografiche, calcoli matematici e la creazione di implementazioni portabili di linguaggi di programmazione.<\/p>\n<p>WebAssembly ricorda molto Asm.js, ma si differenzia per essere un formato binario non legato a JavaScript. In WebAssembly non \u00e8 necessario l'uso di un garbage collector, poich\u00e9 si utilizza la gestione esplicita della memoria. Grazie all'uso del JIT, per WebAssembly \u00e8 possibile raggiungere un livello di prestazioni vicino al codice nativo. Tra le principali sfide di WebAssembly c'\u00e8 la garanzia della portabilit\u00e0, la prevedibilit\u00e0 del comportamento e l'identit\u00e0 dell'esecuzione del codice su diverse piattaforme. Ultimamente, WebAssembly \u00e8 anche <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51849\">promosso<\/a><\/noindex> come una piattaforma universale per l'esecuzione sicura del codice in qualsiasi infrastruttura, sistema operativo e dispositivo, senza limitarsi ai browser.<\/p>\n<p>Il W3C ha standardizzato tre specifiche relative a WebAssembly:<\/p>\n<ul>\n<li class=\"l\">  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.w3.org\/TR\/2019\/REC-wasm-core-1-20191205\/\">WebAssembly Core<\/a><\/noindex> \u2014 descrive una macchina virtuale a basso livello per l'esecuzione di codice intermedio WebAssembly. Le risorse associate a WebAssembly vengono fornite nel formato \u00ab.wasm\u00bb, simile al file \u00ab.class\u00bb in Java e contenente dati statici e segmenti di codice per lavorare con questi dati.\n<li class=\"l\">  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.w3.org\/TR\/2019\/REC-wasm-web-api-1-20191205\/\">WebAssembly Web API<\/a><\/noindex> \u2014 definisce un'interfaccia software basata sul meccanismo Promise per richiedere ed eseguire risorse \u00ab.wasm\u00bb. Il formato delle risorse WebAssembly \u00e8 ottimizzato per avviare l'esecuzione senza aspettare il caricamento completo del file, aumentando cos\u00ec la reattivit\u00e0 delle applicazioni web.\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.w3.org\/TR\/2019\/REC-wasm-js-api-1-20191205\/\">Interfaccia JavaScript di WebAssembly<\/a><\/noindex> \u2014 fornisce un'API per l'integrazione con JavaScript. Permette di ottenere valori e passare parametri a funzioni WebAssembly. L'esecuzione di WebAssembly rispetta il modello di sicurezza di JavaScript e tutte le interazioni con il sistema sottostante avvengono analogamente all'esecuzione di codice JavaScript.\n<\/ul>\n<p>In futuro si prevede di preparare specifiche per tali funzionalit\u00e0 di WebAssembly come:<\/p>\n<ul>\n<li class=\"l\"> Multi-threading con memoria condivisa e accesso atomico alla memoria;\n<li class=\"l\"> Operazioni vettoriali basate su SIMD, che consentono di parallelizzare l'esecuzione dei cicli;\n<li class=\"l\"> Tipi di riferimento per puntamenti diretti su oggetti dal codice WebAssembly;\n<li class=\"l\"> Possibilit\u00e0 di chiamata di funzioni senza consumare spazio aggiuntivo nello stack;\n<li class=\"l\"> Integrazione con i moduli ECMAScript \u2014 possibilit\u00e0 di caricare codice WebAssembly da JavaScript come moduli che rispettano la specifica ECMAScript 6;\n<li class=\"l\"> Modalit\u00e0 di lavoro con il garbage collector;\n<li class=\"l\"> Interfacce di debug;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50406\">WASI<\/a><\/noindex> (WebAssembly System Interface) \u2014 API per l'interazione diretta con il sistema operativo (API POSIX per la gestione di file, socket, ecc.).\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51988\">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 \u043f\u0440\u0438\u0434\u0430\u043d\u0438\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 WebAssembly \u0441\u0442\u0430\u0442\u0443\u0441\u0430 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430. 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. WebAssembly \u043f\u043e\u0437\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u0431\u043e\u043b\u0435\u0435 \u043f\u0435\u0440\u0441\u043f\u0435\u043a\u0442\u0438\u0432\u043d\u0430\u044f \u0438 \u043f\u0435\u0440\u0435\u043d\u043e\u0441\u0438\u043c\u0430\u044f \u043c\u0435\u0436\u0434\u0443 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430\u043c\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 web-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. WebAssembly \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u0447, \u0442\u0440\u0435\u0431\u0443\u044e\u0449\u0438\u0445 \u0432\u044b\u0441\u043e\u043a\u043e\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u043e\u0441\u0442\u0438, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u0438\u0434\u0435\u043e, \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0437\u0432\u0443\u043a\u0430, [&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-53635","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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 \u043f\u0440\u0438\u0434\u0430\u043d\u0438\u0438 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 WebAssembly \u0441\u0442\u0430\u0442\u0443\u0441\u0430 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430.\" \/>\n\t<meta name=\"robots\" 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