{"id":54747,"date":"2020-01-03T00:00:00","date_gmt":"2020-01-02T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push"},"modified":"2020-02-18T14:02:48","modified_gmt":"2020-02-18T11:02:48","slug":"sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/sravnenie-proizvoditelnosti-http-1-1-http-2-i-http-2-server-push","title":{"rendered":"Comparaison des performances HTTP\/1.1, HTTP\/2 et HTTP\/2 + Server Push","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Publi\u00e9<\/a><\/noindex> les r\u00e9sultats de l'\u00e9tude sur la performance de diff\u00e9rentes m\u00e9thodes d'extraction de collections de ressources, en utilisant les protocoles HTTP\/1.1, HTTP\/2 et HTTP\/2 + Server Push pour acc\u00e9der au serveur. L'\u00e9tude a \u00e9galement \u00e9valu\u00e9 l'impact sur la performance de la pr\u00e9sence des donn\u00e9es demand\u00e9es dans le cache du navigateur et de la manipulation des ressources au niveau de la logique de l'application (fusion des ressources en un seul bloc JSON).<\/p>\n

Les tests de performance ex\u00e9cutant 25 requ\u00eates ont montr\u00e9 dans l'ensemble des r\u00e9sultats pr\u00e9visibles \u2014 un retard notable de la requ\u00eate via HTTP\/1.1 avec un cache vide et une livraison des ressources en un seul bloc (tests \u00e9tiquet\u00e9s \u00ab compound \u00bb). La performance de Firefox et de Chrome \u00e9tait \u00e0 peu pr\u00e8s \u00e9quivalente, mais la pr\u00e9sence de donn\u00e9es dans le cache n'a pas entra\u00een\u00e9 l'augmentation d'efficacit\u00e9 attendue.<\/p>\n

\"Comparaison<\/a><\/noindex><\/center><\/p>\n

Cependant, lors du test de traitement de 500 requ\u00eates, un retard significatif de Chrome par rapport \u00e0 Firefox est apparu lors de l'envoi d'un grand nombre de requ\u00eates, et un retard de Firefox par rapport \u00e0 Chrome lorsque le m\u00e9canisme Server Push \u00e9tait utilis\u00e9 et dans une situation d'utilisation d'HTTP\/2 avec une grande partie des donn\u00e9es dans le cache du navigateur. Chrome a montr\u00e9 une gestion plus efficace du cache, tandis que Firefox a \u00e9t\u00e9 plus efficace dans le traitement des requ\u00eates externes.<\/p>\n

\"Comparaison<\/a><\/noindex><\/center><\/p>\n

\"Comparaison<\/a><\/noindex><\/center><\/p>\n

\u00c0 l'issue des tests, il a \u00e9t\u00e9 conclu que HTTP\/2 permet de traiter de mani\u00e8re assez efficace des requ\u00eates s\u00e9par\u00e9es pour une grande collection de ressources. Les diff\u00e9rences de performance entre les simples sch\u00e9mas de restitution s\u00e9par\u00e9e des ressources et les m\u00e9thodes o\u00f9 les ressources sont agr\u00e9g\u00e9es en un seul bloc ne sont pas si significatives pour justifier une complexit\u00e9 de traitement consid\u00e9rable du c\u00f4t\u00e9 de l'application et de serveurs<\/a>. L'agr\u00e9gation n'a de sens que dans les situations o\u00f9 la performance est la priorit\u00e9 absolue. Lorsque la simplification de la logique et une API simple sont plus importantes, il est logique d'utiliser le traitement s\u00e9par\u00e9 des ressources.<\/p>\n

Une autre conclusion est que le cache du navigateur lors de l'utilisation de HTTP\/2 n'a pas d'impact significatif sur la performance du traitement des requ\u00eates (l'ex\u00e9cution compl\u00e8te de 501 requ\u00eates s'est r\u00e9v\u00e9l\u00e9e plus lente que celle de 51 requ\u00eates avec un remplissage du cache de 90 %, soit 1,2 fois plus lente dans Firefox et 2,3 fois plus lente dans Chrome). L'utilisation de Server Push n'a pas montr\u00e9 d'avantage significatif dans Firefox, mais s'est av\u00e9r\u00e9e efficace pour le chargement d'un grand nombre de ressources dans Chrome. Les auteurs de l'\u00e9tude ont \u00e9galement not\u00e9 que l'optimisation du c\u00f4t\u00e9 serveur a un impact plus significatif sur la performance que l'optimisation du code client ex\u00e9cut\u00e9 dans le navigateur.<\/p>\n

<\/a><\/noindex><\/p>\n

Source : opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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