Memory caching (or caching) is a technique in which computer applications temporarily store data in a computer's main memory (i.e., random access memory, or RAM) to enable fast retrievals of that data.
Cache holds a copy of only the most frequently used information or program codes stored in the main memory.
When the user is working on a video project, the video editor may load specific video clips and audio tracks from the hard drive into RAM. Since RAM can be accessed much more quickly than a hard drive, this reduces lag when importing and editing files.
Cache memory is an extremely fast memory type that acts as a buffer between RAM and the CPU. It holds frequently requested data and instructions so that they are immediately available to the CPU when needed.
Caching is especially efficient when the application exhibits a common pattern in which it repeatedly accesses data that was previously accessed.
There are three general cache levels:
*Level 1 (L1) cache, or primary cache, is extremely fast but relatively small
*Level 2 (L2) cache, or secondary cache, is often more capacious than L1
*Level 3 (L3) cache is specialized memory developed to improve the performance of L1 and L2
Cache Memory
