Definition: A cache is a block of RAM used for temporary storage of data that is likely to be used again. The CPU and hard drive frequently use a cache, as do web browsers.
In a CPU there can be several caches, to speed up instructions in loops or to store often accessed data. These caches are small but very fast. Reading data from cache memory is much faster than reading it from RAM.
Glossary:
A B C D E F G H I J K L M N O P Q R S T U V W X Y ZExamples:
If data is in a cache then that is a cache hit. If it's not then it is a cache miss.
