Alternative PHP Cache, or APC, is a module for Apache web servers which is used to cache the output code of script apps. It is very efficient for scripts with large source code and could boost such a site up to three times. PHP sites are dynamic and whenever a visitor accesses some page, the script links to a database to get some content, and then the code is parsed and compiled before it's displayed to the site visitor. In case the output code doesn't change however, that is the case with websites that display the very same content at all times, these actions result in unneeded reading and writing. What APC does is that it caches the previously compiled code and delivers it every time visitors browse a site, so the database doesn't have to be accessed and the program code does not have to be parsed and compiled continuously, which in turn minimizes the site loading time. The module could be pretty effective for informational websites, blogs, portfolios, etcetera.