The cached data includes some friends' avatars, chat records, pictures and so on.

Data cache refers to the high-speed memory inside the hard disk, which temporarily stores some data for reading and rereading like a buffer. The hard disk with big data cache has great advantages when accessing scattered files.

Cache refers to the memory area where data is temporarily stored during downloading. Cache can effectively prevent programs from being frequently written to the hard disk.

It refers to the temporary file exchange area. Mobile phones take the most commonly used files out of the memory and temporarily put them in the cache, just like putting tools and materials on the workbench, which is more convenient than going to the warehouse to get them.

Because the cache often uses RAM, it is not permanently stored in case of power failure, and files will still be sent to the phone memory after being busy.

Cache can effectively prevent the electric donkey program from being frequently written into the hard disk, because when you set the cache, only temporary data will be written into the hard disk when it reaches the specified size.

Cache, in its original meaning, refers to a kind of high-speed memory with faster access speed than ordinary random access memory (RAM). Generally, DRAM technology is not used like system main memory, but SRAM technology, which is expensive but faster.

The setting of cache is one of the important factors for all modern computer systems to play a high performance.