Can deleting the cache and cleaning up the garbage really make the phone faster?

Before talking about cleaning up garbage, we must first understand the three concepts of "memory", "application cache" and "storage space". Memory (RAM), the larger the RAM of the mobile phone, the faster the running speed of the app, and the more apps running at the same time, the faster the switching speed of the app. RAM is temporarily stored. When the application is closed, RAM will be released. RAM of mainstream Android phones is generally 4G~8G.

For example, when we open Weibo, we can see in "Settings → Clear Cache" that the cache in Weibo includes "offline content, pictures, videos and other data". In other words, the application cache is Weibo pictures, WeChat avatars, hungry menus, headline articles, Iqiyi videos and so on. Obtained after entering the application. Caching ensures that you have seen the content once, even if there is no network.

Storage space. Many years ago, there was a joke that a domestic mobile phone was better than the iPhone. The memory of the iPhone was only 1G, while this mobile phone had 16G. In fact, the storage space of mobile phone is the internal storage of mobile phone, which corresponds to the external storage such as memory card. This "memory" is not the same as RAM. The software we downloaded, the photos we took and the cached videos are all stored in the storage space.

Neither Android nor iOS supports virtual memory. No matter how large the storage space of the mobile phone is, it will not be allocated to RAM, thus improving the speed of the mobile phone. However, large storage space means less disk fragmentation, which means that files are read and written continuously with high probability, but this has a subtle impact on the speed. Let's give a popular example. Application cache is a kind of mobile phone junk. After cleaning up the application cache in Weibo, when we enter Weibo again, we have to reload blog posts, photos, avatars and other contents. This did not speed up the speed of entering the software, but slowed it down.