{"json_modified": "2016-04-23T07:53:51.816417", "uuid": "e7e8d69c-9e31-4875-b14e-a4a33560e008", "title": "Performance : les dangers li\u00e9s \u00e0 la modification de [[Prototype]", "url": "/fr/docs/Web/JavaScript/Performance_les_dangers_li%C3%A9s_%C3%A0_la_modification_de_Prototype", "tags": ["JavaScript", "performance", "Performance"], "translations": [{"uuid": "c612ed1a-3cbf-472b-bbd4-778219cbed2e", "title": "The performance hazards of  [[Prototype]] mutation", "url": "/en-US/docs/Web/JavaScript/The_performance_hazards_of__%5B%5BPrototype%5D%5D_mutation", "tags": ["JavaScript", "performance", "Performance"], "summary": "<span/>", "localization_tags": [], "locale": "en-US", "last_edit": "2016-04-18T11:25:27", "review_tags": []}], "modified": "2016-04-23T07:53:51", "label": "Performance : les dangers li\u00e9s \u00e0 la modification de [[Prototype]", "localization_tags": [], "locale": "fr", "id": 181120, "last_edit": "2016-04-23T07:53:49", "summary": "ECMAScript 6 introduit certaines m\u00e9thode pour <em>modifier</em> <code>[[Prototype]]</code>. Cette flexibilit\u00e9 a un co\u00fbt : la d\u00e9gradation significative des performances. <strong>Modifier</strong> <strong><code>[[Prototype]]</code> impacte n\u00e9gativement les performances pour <em>tous</em> les moteurs JavaScript modernes.</strong> Dans cet article, nous expliquerons pourquoi et nous verrons les alternatives \u00e0 privil\u00e9gier.", "sections": [{"id": "De_l'optimisation_des_acc\u00e8s_aux_propri\u00e9t\u00e9s_dans_les_moteurs_JavaScript", "title": "De l'optimisation des acc\u00e8s aux propri\u00e9t\u00e9s dans les moteurs JavaScript"}, {"id": "L'optimisation_na\u00efve_des_propri\u00e9t\u00e9s_h\u00e9rit\u00e9es", "title": "L'optimisation na\u00efve des propri\u00e9t\u00e9s h\u00e9rit\u00e9es"}, {"id": "L'optimisation_intelligente_des_propri\u00e9t\u00e9s_h\u00e9rit\u00e9es", "title": "L'optimisation intelligente des propri\u00e9t\u00e9s h\u00e9rit\u00e9es"}, {"id": "Les_effets_n\u00e9fastes_de_la_modification_de_Prototype", "title": "Les effets n\u00e9fastes de la modification de "}, {"id": "Modifier_un_Prototype_prend_du_temps", "title": "Modifier un "}, {"id": "Les_Prototypes_modifi\u00e9s_ralentissent_le_code", "title": "Les "}], "slug": "Web/JavaScript/Performance_les_dangers_li\u00e9s_\u00e0_la_modification_de_Prototype", "review_tags": ["technical"]}