Can you explain what is meant by Cache Line in computer architecture?

A Cache Line is the smallest block of data that the processor loads from main memory into the cache. Typically, the size of a Cache Line is 64 bytes.

When the processor accesses memory, it doesn't load a single byte or word, but the entire Cache Line at once to improve access efficiency and utilize data locality.

This is important for performance, as operations within a single Cache Line are faster, and improper alignment or frequent access to different Cache Lines can lead to cache misses and reduced speed.

Example: if you have an array and iterate through it sequentially, you effectively utilize Cache Lines because data is loaded in blocks. If access to elements is random, the cache will be used less efficiently.