Even though we often hear terms like L1, L2, cache block, etc., most programmers have a limited idea of what cache really is and what it does. In this article, we'll briefly explain what cache is, how it can be implemented, and the need for cache in the first place. If there's one thing that is essential to my programming knowledge arsenal, that is the CPU cache. Cache is a double-edged sword that can make the life of a programmer who understands how to deal with it much easier and the life of t...