Cache

A cache is often defined as a collection of data that duplicates original values stored in another location. In this instance, fetching data from the cache may be more convenient than pulling it from the original source. To put it in simpler terms, a cache acts as a temporary storage unit where frequently used data is stored for more rapid access. Once stored in the cache, data can be made available for future use by fetching a cached copy instead of re-computing the original data. The cache has shown to be very effective in various areas of computing due to the fact that access patterns in basic computer programs use a locality of reference. While locality is a very broad term, the cache mainly relates to data accessed at close time intervals or temporal locality. In modern times, a cache is mostly associated with the virtual storage unit that contains temporary internet data.