Cache Line

A cache line is the smallest unit of data transferred between a computer's main memory and its cache storage. Think of it as a small block of memory—typically 64 bytes—that the system loads or saves at once. When a computer needs data, it fetches the entire cache line containing that data to improve speed, since accessing multiple small pieces individually takes longer. This organization helps computers work more efficiently by reducing the number of times they need to communicate with slower main memory.