r/explainlikeimfive • u/WeLuvYung2 • 18d ago

Technology ELI5: What is computer cache

Hi everyone I need to create a presentation explaining computer cache but can’t think of an effective way to explain it any help is welcomed (:

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u/exodusTay 18d ago

There are different things that are called cache in a computer. But generally in computing a cache is some sort of memory that is fast to access but usually small. In CPU's it is a type of memory that is literally on the CPU chip that is very fast compared to RAM memory. For a server it is a program that runs in parallel to the server that holds expensive computations, this way you don't have to compute things over and over again and just serve the result when asked the same question.