Cache _ Cache

Recently, a PP accelerator was launched to watch videos online. Then I found a folder named: cache on the desktop. I deleted it if I did not know what it was. Then I found this name when searching for the Anti-Virus engine, and I checked it, to be honest, I don't know what it means.

Cache: A special storage subsystem for high-speed buffer storage, where frequently used data is copied for quick access. Memory's high-speed buffer memory stores the content of frequently accessed Ram locations and the storage addresses of these data items. When the processor references an address in the memory, the cache checks whether the address exists. If the address exists, the data is returned to the processor. if the address is not saved, regular memory access is performed. Because high-speed buffer memory is always faster than the primary RAM memory, when the access speed of Ram is lower than that of the microprocessor, high-speed buffer memory is often used.

(This is equivalent to the Temporary Folder used to browse the Web page. Cache .)

Cache is a high-speed and small-capacity temporary memory. It can be implemented using a high-speed static memory chip or integrated into the CPU chip to store the commands or operation data frequently accessed by the CPU.

Cached stores the read data. When you read the data again, you do not need to read the hard disk if it hits (find the required data). If it does not hit the hard disk. The data is organized according to the read frequency, and the most frequently read content is placed in the most easily located location. The unread content is arranged until it is deleted.

The cache is often used in disk I/O requests. If multiple processes need to access a file, the file is made into a cache to facilitate next access, this improves the system performance. (Oh, sauce purple)