Emmanuel

There is a unit in the computer known as Cache which is a hardware cache used by a computer's central processing unit (CPU) to reduce the average cost (time or energy) of accessing data from main memory. Cache is smaller, faster memory located closer to the processor core to store copies of data from frequently used main memory locations. Most processors have a hierarchy of multiple cache levels (L1, L2, usually L3, and rarely even L4), with different instructions and a data-specific cache at level 1.