<\/div>\n
Bien que tout le monde ne puisse pas encore en profiter, la mise \u00e0 jour Android 4.4.2. KitKat du Galaxy S4 <\/b>est en cours depuis un bon mois. G\u00e9n\u00e9ralement, la mise \u00e0 jour d\u2019un appareil, de surcroit haut de gamme, sous une version plus r\u00e9cente de son OS permet d\u2019offrir un gain de performances souvent visible aussi bien \u00e0 l\u2019utilisation que dans les tests. Toutefois d\u2019apr\u00e8s les benchmarks r\u00e9alis\u00e9s par le site am\u00e9ricain Tom\u2019s Hardware, il semblerait que, dans le cas pr\u00e9sent, ce soit le contraire.<\/p>\n
![\"samsung-galaxy-s4\"](\"https:\/\/img.phonandroid.com\/2014\/11\/samsung-galaxy-s4.jpg\")
<\/p>\n
La r\u00e9cente mise \u00e0 jour Android 4.4.2 KitKat du Galaxy S4<\/b> a-t-elle amoindri les performances du fleuron 2013 de Samsung\u00a0? A en croire les derniers benchmarks<\/b> de Tom\u2019s Hardware, il appara\u00eet que l\u2019appareil est d\u00e9sormais moins performant qu\u2019il ne l\u2019\u00e9tait sous Android 4.2 ou 4.3. Et la raison de cette r\u00e9trogradation serait due, non pas aux nouveaut\u00e9s apport\u00e9es par Google mais aux r\u00e9glages faits par Samsung sur l\u2019algorithme DVFS du t\u00e9l\u00e9phone cens\u00e9 g\u00e9rer les fr\u00e9quences et tensions de l\u2019appareil.<\/p>\n
Concr\u00e8tement parlant, l\u2019algorithme DVFS est cens\u00e9 apporter un \u00e9quilibre entre performance et autonomie <\/b>en r\u00e9duisant la vitesse du processeur et du GPU d\u00e9s que l\u2019appareil atteint un certain niveau de chauffe, or dans le cas pr\u00e9sent, il amoindrirait les performances de l\u2019appareil. \u00a0Avant d\u2019arriver \u00e0 cette conclusion, le site am\u00e9ricain \u00e0 r\u00e9alis\u00e9 plusieurs benchmarks\u00a0dont un premier \u00ab\u00a0\u00e0 froid\u00a0\u00bb durant lequel les performances sous KitKat<\/b> \u00e9taient sensiblement les m\u00eames que sous Jelly Bean.<\/p>\n
Toutefois, il est apparu que d\u00e9s que le t\u00e9l\u00e9phone commen\u00e7ait \u00e0 chauffer, le DVFS s\u2019est alors mis en route entra\u00eenant une chute de performances assez bien visible sur le graphique ci-dessus et pour cause puisque la fr\u00e9quence du processeur Snapdragon 600 du smartphone est alors pass\u00e9e de 1,9 Ghz \u00e0 918 Mhz.<\/p>\n
Afin d\u2019\u00e9tayer cette th\u00e9orie, et sachant que, depuis KitKat Samsung ne triche plus aux benchmarks, l\u2019\u00e9quipe du site \u00e0 ensuite tenu \u00e0 tester les performances<\/b> d\u2019un Galaxy S4 mis \u00e0 jour sous Android 4.4.2 KitKat sur le jeu Real Racing 3<\/b>. Comme vous pourrez l\u2019observer sur l\u2019image ci-dessous, le processeur \u00e0 1458 Mhz en d\u00e9but de partie chute tr\u00e8s rapidement \u00e0 918 Mhz.<\/p>\n
La mise \u00e0 jour Android 4.4.2 KitKat du Galaxy S4<\/a> vous enthousiaste-t-elle toujours autant apr\u00e8s \u00e7a\u00a0?<\/p>\n
Via<\/em><\/a><\/p>\n
<\/div>\n","protected":false},"excerpt":{"rendered":"D’apr\u00e8s les r\u00e9cents benchmarks r\u00e9alis\u00e9s par Tom’s Hardware, la r\u00e9cente mise \u00e0 jour Android 4.4.2 KitKat du Galaxy S4 a fait chuter les performances de l’appareil. 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