{"id":115256,"date":"2024-04-23T14:30:14","date_gmt":"2024-04-23T12:30:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/analiz-vliyaniya-klyuchevogo-slova-final-na-proizvoditelnost-programm-c"},"modified":"2024-04-23T14:30:14","modified_gmt":"2024-04-23T12:30:15","slug":"analiz-vliyaniya-klyuchevogo-slova-final-na-proizvoditelnost-programm-c","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/analiz-vliyaniya-klyuchevogo-slova-final-na-proizvoditelnost-programm-c","title":{"rendered":"Analisi dell'impatto della parola chiave final sulle prestazioni dei programmi C++","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Benjamin Summerton, autore del sistema di ray tracing PSRayTracing, ha analizzato l'impatto sull'efficienza delle applicazioni dell'utilizzo della keyword C++ &#171;final&#187;, introdotta con lo standard C++11. La motivazione per questa analisi \u00e8 stata l'emergere di affermazioni online secondo cui l'uso di &#171;final&#187; migliora le prestazioni, basate su giudizi qualitativi privi di risultati concreti.   <\/p>\n<p>I test condotti da Benjamin hanno rivelato che le prestazioni con l'uso di &#171;final&#187; dipendono fortemente dal compilatore. Durante la compilazione con GCC, in effetti, in molti casi sono migliorate le prestazioni, mentre con Clang e MSVC si \u00e8 registrato un calo delle prestazioni nella maggior parte dei casi, e in modo pi\u00f9 significativo. Inoltre, la piattaforma ha avuto un grande impatto; ad esempio, la diminuzione delle prestazioni si \u00e8 manifestata in modo pi\u00f9 evidente su un sistema con CPU AMD Ryzen 9 6900HX rispetto a uno con CPU Apple M1.        <center><img decoding=\"async\" alt=\"Analisi dell&#039;impatto della parola chiave final sulle prestazioni dei programmi C++\" src=\"\/wp-content\/uploads\/2024\/04\/9e55c4aae98abf55256d17cde33d6e25.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <center><img decoding=\"async\" alt=\"Analisi dell&#039;impatto della parola chiave final sulle prestazioni dei programmi C++\" src=\"\/wp-content\/uploads\/2024\/04\/426ece3a04fc856200c6bc262503573b.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>        <\/p>\n<p>Ad esempio, su un sistema AMD Ryzen 9 6900HX con Ubuntu 23.10, durante la compilazione con Clang, nel 90% dei test l'uso di &#171;final&#187; ha comportato un rallentamento di almeno il 5%, mentre nel 2.5% dei casi si \u00e8 registrato un incremento di almeno il 5%. Con GCC, un rallentamento del 5% si \u00e8 verificato nello 0.9% dei casi, mentre un incremento del 5% \u00e8 avvenuto nel 15.8% dei casi. In MSVC, il rallentamento del 5% \u00e8 stato osservato nel 26.2% dei test, mentre l'incremento del 5% si \u00e8 verificato nel 13.3%. L'autore dello studio ha concluso che \u00e8 necessario evitare l'uso di &#171;final&#187;.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61051\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0411\u0435\u043d\u0434\u0436\u0430\u043c\u0438\u043d \u0421\u0430\u043c\u043c\u0435\u0440\u0442\u043e\u043d (Benjamin Summerton), \u0430\u0432\u0442\u043e\u0440 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0442\u0440\u0430\u0441\u0441\u0438\u0440\u043e\u0432\u043a\u0438 \u043b\u0443\u0447\u0435\u0439 PSRayTracing, \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b \u0432\u043b\u0438\u044f\u043d\u0438\u0435 \u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0432 \u043a\u043e\u0434\u0435 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421++ \u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0433\u043e \u0441\u043b\u043e\u0432\u0430 &#171;final&#187;, \u043f\u043e\u044f\u0432\u0438\u0432\u0448\u0435\u0433\u043e\u0441\u044f \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0435 C++11. \u041f\u0440\u0438\u0447\u0438\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0443\u0436\u0438\u043b\u0438 \u0432\u0438\u0442\u0430\u044e\u0449\u0438\u0435 \u0432 \u0441\u0435\u0442\u0438 \u0437\u0430\u044f\u0432\u043b\u0435\u043d\u0438\u044f, \u0447\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 &#171;final&#187; \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u043b\u0438\u0441\u044c \u043e\u0446\u0435\u043d\u043e\u0447\u043d\u044b\u043c\u0438 \u0441\u0443\u0436\u0434\u0435\u043d\u0438\u044f\u043c\u0438 \u0431\u0435\u0437 \u0443\u043a\u0430\u0437\u0430\u043d\u0438\u044f \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u0432 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439. \u041f\u0440\u043e\u0432\u0435\u0434\u0451\u043d\u043d\u043e\u0435 \u0411\u0435\u043d\u0434\u0436\u0430\u043c\u0438\u043d\u043e\u043c \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u043a\u0430\u0437\u0430\u043b\u043e, \u0447\u0442\u043e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":115257,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-115256","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0411\u0435\u043d\u0434\u0436\u0430\u043c\u0438\u043d \u0421\u0430\u043c\u043c\u0435\u0440\u0442\u043e\u043d (Benjamin Summerton), \u0430\u0432\u0442\u043e\u0440 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0442\u0440\u0430\u0441\u0441\u0438\u0440\u043e\u0432\u043a\u0438 \u043b\u0443\u0447\u0435\u0439 PSRayTracing, \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b \u0432\u043b\u0438\u044f\u043d\u0438\u0435 \u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0432 \u043a\u043e\u0434\u0435 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421++ \u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0433\u043e \u0441\u043b\u043e\u0432\u0430 &quot;final&quot;, \u043f\u043e\u044f\u0432\u0438\u0432\u0448\u0435\u0433\u043e\u0441\u044f \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0435 C++11. \u041f\u0440\u0438\u0447\u0438\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0443\u0436\u0438\u043b\u0438 \u0432\u0438\u0442\u0430\u044e\u0449\u0438\u0435 \u0432 \u0441\u0435\u0442\u0438 \u0437\u0430\u044f\u0432\u043b\u0435\u043d\u0438\u044f, \u0447\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 &quot;final&quot; \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u043b\u0438\u0441\u044c \u043e\u0446\u0435\u043d\u043e\u0447\u043d\u044b\u043c\u0438 \u0441\u0443\u0436\u0434\u0435\u043d\u0438\u044f\u043c\u0438 \u0431\u0435\u0437 \u0443\u043a\u0430\u0437\u0430\u043d\u0438\u044f \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u0432 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439. \u041f\u0440\u043e\u0432\u0435\u0434\u0451\u043d\u043d\u043e\u0435 \u0411\u0435\u043d\u0434\u0436\u0430\u043c\u0438\u043d\u043e\u043c \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u043a\u0430\u0437\u0430\u043b\u043e, \u0447\u0442\u043e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c\" \/>\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\/novosti-interneta\/analiz-vliyaniya-klyuchevogo-slova-final-na-proizvoditelnost-programm-c\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.0.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"it_IT\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0410\u043d\u0430\u043b\u0438\u0437 \u0432\u043b\u0438\u044f\u043d\u0438\u044f \u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0433\u043e \u0441\u043b\u043e\u0432\u0430 final \u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c C++ | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u0411\u0435\u043d\u0434\u0436\u0430\u043c\u0438\u043d \u0421\u0430\u043c\u043c\u0435\u0440\u0442\u043e\u043d (Benjamin Summerton), \u0430\u0432\u0442\u043e\u0440 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0442\u0440\u0430\u0441\u0441\u0438\u0440\u043e\u0432\u043a\u0438 \u043b\u0443\u0447\u0435\u0439 PSRayTracing, \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b \u0432\u043b\u0438\u044f\u043d\u0438\u0435 \u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0432 \u043a\u043e\u0434\u0435 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421++ \u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0433\u043e \u0441\u043b\u043e\u0432\u0430 &quot;final&quot;, \u043f\u043e\u044f\u0432\u0438\u0432\u0448\u0435\u0433\u043e\u0441\u044f \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0435 C++11. \u041f\u0440\u0438\u0447\u0438\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0443\u0436\u0438\u043b\u0438 \u0432\u0438\u0442\u0430\u044e\u0449\u0438\u0435 \u0432 \u0441\u0435\u0442\u0438 \u0437\u0430\u044f\u0432\u043b\u0435\u043d\u0438\u044f, \u0447\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 &quot;final&quot; 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La motivazione per il test \u00e8 stata la diffusione in rete di affermazioni secondo cui l'uso di \"final\" pu\u00f2 migliorare le prestazioni, che si limitavano a valutazioni soggettive senza risultati concreti. I test condotti da Benjamin hanno mostrato che le prestazioni","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/analiz-vliyaniya-klyuchevogo-slova-final-na-proizvoditelnost-programm-c","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0410\u043d\u0430\u043b\u0438\u0437 \u0432\u043b\u0438\u044f\u043d\u0438\u044f \u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0433\u043e \u0441\u043b\u043e\u0432\u0430 final \u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c C++ | ProHoster","og:description":"\u0411\u0435\u043d\u0434\u0436\u0430\u043c\u0438\u043d \u0421\u0430\u043c\u043c\u0435\u0440\u0442\u043e\u043d (Benjamin Summerton), \u0430\u0432\u0442\u043e\u0440 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0442\u0440\u0430\u0441\u0441\u0438\u0440\u043e\u0432\u043a\u0438 \u043b\u0443\u0447\u0435\u0439 PSRayTracing, \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b \u0432\u043b\u0438\u044f\u043d\u0438\u0435 \u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0432 \u043a\u043e\u0434\u0435 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421++ \u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0433\u043e \u0441\u043b\u043e\u0432\u0430 &quot;final&quot;, \u043f\u043e\u044f\u0432\u0438\u0432\u0448\u0435\u0433\u043e\u0441\u044f \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0435 C++11. \u041f\u0440\u0438\u0447\u0438\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0443\u0436\u0438\u043b\u0438 \u0432\u0438\u0442\u0430\u044e\u0449\u0438\u0435 \u0432 \u0441\u0435\u0442\u0438 \u0437\u0430\u044f\u0432\u043b\u0435\u043d\u0438\u044f, \u0447\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 &quot;final&quot; 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