Alternative PHP Cache, or APC, is a module for Apache servers which is employed to cache the output code of script apps. It is very efficient for scripts with large source code and will boost such a site as much as 3 times. PHP sites are dynamic and any time a website visitor accesses some web page, the script hooks up to a database to get some content, after that the code is parsed and compiled prior to it being shown to the visitor. In case the output code doesn't change however, which is the case with Internet sites that display the very same content all the time, these actions trigger excessive reading and writing. What APC does is that it caches the previously compiled code and delivers it whenever visitors browse a site, so the database doesn't have to be accessed and the code doesn't need to be parsed and compiled again and again, which in turn lowers the Internet site loading time. The module can be extremely efficient for informational Internet sites, blogs, portfolios, and many others.