Originally developed back in 2003 by a programmer named Brian Fitzpatrick, Memcache was intended to be used to speed up web servers by combining the system's free memory into one large cache from which each component of the application could take as much as it needed to operate without taking more than it required.
Due to its open-source nature, Memcache is a generic tool that can be used to optimize most any application running on your system. Without Memcache installed into your operating system, your computer is required to search through all the files to find each individual piece of an application upon execution. Once a file has been located, its location is stored in the system memory for faster retrieval.
The trouble is that each component may be stored with an excess of memory. That excess memory could be used to archive another component instead. To fix this, Memcache simply combines the entire memory into a single cache so that each component of the application may be stored together where it only takes what it needs and leaves the excess for something else.
With memcache, your system will be performing much faster and more efficiently.