{"id":95274,"date":"2020-09-27T13:42:11","date_gmt":"2020-09-27T11:42:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-nochnyh-sborkah-firefox-zametno-uvelichena-proizvoditelnost-jit-kompilyaczii"},"modified":"2020-09-27T13:42:11","modified_gmt":"2020-09-27T11:42:11","slug":"v-nochnyh-sborkah-firefox-zametno-uvelichena-proizvoditelnost-jit-kompilyaczii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/v-nochnyh-sborkah-firefox-zametno-uvelichena-proizvoditelnost-jit-kompilyaczii","title":{"rendered":"Nelle versioni notturne di Firefox \u00e8 notevolmente aumentata la performance della compilazione JIT.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>In <noindex><a rel=\"nofollow\" href=\"https:\/\/nightly.mozilla.org\/\">build notturne<\/a><\/noindex> Firefox <noindex><a rel=\"nofollow\" href=\"https:\/\/groups.google.com\/g\/mozilla.dev.platform\/c\/1PHhxBxSehQ\/m\/V-tLMPftBQAJ\">incluso<\/a><\/noindex> un compilatore JIT aggiornato, <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1613592\">sviluppato<\/a><\/noindex> con il nome in codice WarpBuilder. Per attivare il nuovo JIT in about:config \u00e8 proposta l'opzione &lt;javascript.options.warp&gt;.<br \/>\nSi segnala che WarpBuilder \u00e8 solo il primo passo verso l'integrazione nel browser di nuove ottimizzazioni, che si prevede realizzare nel corso del prossimo anno.<\/p>\n<p>Il nuovo JIT consente di aumentare le prestazioni del motore JavaScript SpiderMonkey grazie alla riduzione delle informazioni interne sui tipi, monitorate all'interno del motore, e all'applicazione della tecnica di caching del codice intermedio (CacheIR), precedentemente <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51727\">proposta<\/a><\/noindex> nell'interprete bytecode 'baseline', che occupa una posizione intermedia tra l'interprete tradizionale e il JIT-compiler. Le modifiche indicate hanno reso possibile semplificare notevolmente l'architettura JIT, migliorare la reattivit\u00e0, ridurre i tempi di caricamento delle pagine e abbattere il consumo di memoria.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.mozilla.org\/show_bug.cgi?id=1613592\">Osservato<\/a><\/noindex>, il che ha permesso al nuovo JIT di risolvere molti problemi del vecchio JIT IonBuilder, come:<\/p>\n<ul>\n<li class=\"l\"> Complessit\u00e0 di implementazione e potenziali problemi di sicurezza;\n<li class=\"l\"> Oneri aggiuntivi per il codice Baseline\/C++;\n<li class=\"l\"> Specializzazione eccessiva, che porta a ricompilazioni non necessarie;\n<li class=\"l\"> Generazione di codice intermedio <noindex><a rel=\"nofollow\" href=\"https:\/\/wiki.mozilla.org\/IonMonkey\/MIR\">MIR<\/a><\/noindex>  (Middle-level IR) nel flusso principale (in WarpBuilder, la compilazione principale del codice intermedio \u00e8 stata spostata in un flusso separato);\n<li class=\"l\"> Ulteriore consumo di memoria per memorizzare dati sui tipi e gruppi di oggetti (ObjectGroups).\n<\/ul>\n<p>In media, nei test che valutano le prestazioni basate su metriche visive, l'utilizzo di WarpBuilder ha mostrato un'accelerazione del 5-15%. La velocit\u00e0 di esecuzione del test Speedometer \u00e8 aumentata del 10%. I test su siti reali hanno mostrato una riduzione del tempo di caricamento di Google Docs su <noindex><a rel=\"nofollow\" href=\"https:\/\/mzl.la\/3cp6dAs\">20%<\/a><\/noindex>, valore <noindex><a rel=\"nofollow\" href=\"https:\/\/web.dev\/speed-index\/\">SpeedIndex<\/a><\/noindex> nell'apertura della sezione Android su Reddit \u00e8 migliorato di <noindex><a rel=\"nofollow\" href=\"https:\/\/mzl.la\/2RUWdp8\">13%<\/a><\/noindex>, pdfpaint \u00e8 diventato pi\u00f9 veloce su <noindex><a rel=\"nofollow\" href=\"https:\/\/mzl.la\/2HtXb9W\">18%<\/a><\/noindex>. Il consumo di memoria nel test <noindex><a rel=\"nofollow\" href=\"https:\/\/mzl.la\/3j2VwGb\">tp6<\/a><\/noindex> \u00e8 diminuito dell'8%. <noindex><a rel=\"nofollow\" href=\"https:\/\/mzl.la\/3kLbhSM\">Le metriche<\/a><\/noindex> nelle statistiche degli strumenti per sviluppatori (devtools perf) hanno inoltre mostrato una riduzione del consumo di memoria dell'8%.<\/p>\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=53789\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043d\u043e\u0447\u043d\u044b\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 Firefox \u0432\u043a\u043b\u044e\u0447\u0451\u043d \u043e\u0431\u043d\u043e\u0432\u043b\u0451\u043d\u043d\u044b\u0439 JIT-\u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440, 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\u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0432 \u0442\u0435\u0447\u0435\u043d\u0438\u0435 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0433\u043e \u0433\u043e\u0434\u0430. \u041d\u043e\u0432\u044b\u0439 JIT \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u043e\u0434\u043d\u044f\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c JavaScript-\u0434\u0432\u0438\u0436\u043a\u0430 SpiderMonkey \u0437\u0430 \u0441\u0447\u0451\u0442 \u0441\u043e\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 [&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-95274","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043d\u043e\u0447\u043d\u044b\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 Firefox\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/it\/blog\/news\/v-nochnyh-sborkah-firefox-zametno-uvelichena-proizvoditelnost-jit-kompilyaczii\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.0.1\" \/>\n\t\t<meta property=\"og:locale\" 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