Django caching

Caching is faster when it is small amount and since caching is done in a memory like RAM in programming. But i came across this caching in file system. Since the operation in file system is slow why would we cache in file system. FYI, there is this option of caching in file system in Django. Am i reading it in some wrong way or something. Help me. I might have the wrong concept of caching too i think. Anybody can enlighten me here?

原文链接：Django caching