{"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\/fr\/blog\/news\/analiz-vliyaniya-klyuchevogo-slova-final-na-proizvoditelnost-programm-c","title":{"rendered":"Analyse de l'impact du mot-cl\u00e9 final sur les performances des programmes C++","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Benjamin Summerton, auteur du syst\u00e8me de ray tracing PSRayTracing, a analys\u00e9 l'impact sur la performance des applications de l'utilisation du mot-cl\u00e9 C++ \u00ab final \u00bb, introduit dans la norme C++11. La raison de ces tests \u00e9tait aliment\u00e9e par des affirmations circulant sur Internet selon lesquelles l'utilisation de \u00ab final \u00bb pourrait optimiser la performance, mais qui \u00e9taient bas\u00e9es sur des jugements qualitatifs sans fournir de r\u00e9sultats concrets.   <\/p>\n<p>Les tests r\u00e9alis\u00e9s par Benjamin ont montr\u00e9 que la performance avec \u00ab final \u00bb d\u00e9pendait fortement du compilateur. En effet, lors de la compilation avec GCC, la performance augmentait dans un nombre significatif de cas, mais avec Clang et MSVC, la performance diminuait dans la majorit\u00e9 des cas, de mani\u00e8re plus marqu\u00e9e. De plus, la plateforme influen\u00e7ait \u00e9galement, par exemple, la baisse de performance \u00e9tait plus prononc\u00e9e sur un syst\u00e8me avec CPU AMD Ryzen 9 6900HX que sur un syst\u00e8me avec CPU Apple M1.        <center><img decoding=\"async\" alt=\"Analyse de l&#039;impact du mot-cl\u00e9 final sur les performances des programmes C++\" src=\"\/wp-content\/uploads\/2024\/04\/9e55c4aae98abf55256d17cde33d6e25.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <center><img decoding=\"async\" alt=\"Analyse de l&#039;impact du mot-cl\u00e9 final sur les performances des programmes C++\" src=\"\/wp-content\/uploads\/2024\/04\/426ece3a04fc856200c6bc262503573b.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>        <\/p>\n<p>Par exemple, sur un syst\u00e8me AMD Ryzen 9 6900HX avec Ubuntu 23.10, lors de la compilation avec Clang, 90 % des tests ont montr\u00e9 un ralentissement d'au moins 5 % en utilisant \u00ab final \u00bb, mais dans 2,5 % des cas, un gain d'au moins 5 % a \u00e9t\u00e9 observ\u00e9. Pour GCC, un ralentissement de 5 % a \u00e9t\u00e9 constat\u00e9 dans 0,9 % des cas, tandis qu'un gain de 5 % a \u00e9t\u00e9 not\u00e9 dans 15,8 % des cas. Avec MSVC, un ralentissement de 5 % se produisait dans 26,2 % des tests, alors qu'un gain de 5 % \u00e9tait observ\u00e9 dans 13,3 %. L'auteur de l'\u00e9tude en a conclu qu'il \u00e9tait pr\u00e9f\u00e9rable d'\u00e9viter l'utilisation de \u00ab final \u00bb.<br \/>\n<br \/>Source : <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-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - 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, 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mot-cl\u00e9 final sur la performance des programmes C++ | ProHoster","description":"Benjamin Summerton, auteur du syst\u00e8me de tra\u00e7age de rayons PSRayTracing, a analys\u00e9 l'impact de l'utilisation du mot-cl\u00e9 \"final\" dans le code C++ sur la performance des applications.","canonical_url":"https:\/\/prohoster.info\/fr\/blog\/news\/analiz-vliyaniya-klyuchevogo-slova-final-na-proizvoditelnost-programm-c","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"fr_FR","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 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