[情報] 為何1GB RAM的iPhone比2GB的Android快已回收
為何 iPhone 6 只有 1GB RAM,卻比 2GB RAM 的 Android 手機更快?
http://www.cool3c.com/article/86899
雖然現在大部分 Android 旗艦手機都已經有 2GB RAM,但 iPhone 6 / 6 Plus 卻繼續
配備 1GB RAM,令不少人失望。不過事實證明 iPhone 6 利用這 1GB RAM,速度已經能
超越 2GB RAM 的 Android 機。究竟為甚麼? 原來就和 iOS / Android 運行 apps 的
方法有個根本的分別。
Android apps 透過 Java 來運行,缺點是需要進行一個名為「垃圾收集」的程序,就
是當你用完 Android app 後,就要靠這個程序才能釋出 RAM 讓其他 apps 使用。問題
是這個程序本身就需要額外的 RAM 才能順暢地運作。如果運行多個 apps,或者進行高
需求工作,RAM 不夠給「垃圾收集」使用,裝置就會變慢。
至於 iOS 一開始的設計就特意避免「垃圾收集」這個問題,裝置需要的 RAM 就是 apps
需要的 RAM,無需預留額外 RAM 才能順暢地運作。因為這樣 Android 手機就需要比
iPhone 多一倍的 RAM 才能好好地跑 apps。
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這篇文章為蘋果只給1GB RAM卻能給使用者相當於Android 2GB甚至3GB RAM的順暢體驗
給出了一個理由。不過在Android 5.0 Lolipop全面使用ART的情況下,Android是否終
於可以跟iOS平起平坐?但奇怪的是,從目前4.4能開ART的機器表現看起來,ART 似乎
帶來的使用者體驗提昇也沒有太多,這中間到底發生了什麼事情呢?
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