Alternative PHP Cache, or APC, is a module for Apache servers which is used to cache the output code of script applications. It is very effective for scripts with large source code and can speed up such a site as much as 3 times. PHP websites are dynamic and any time a website visitor accesses a webpage, the script connects to a database to retrieve some content, then the code is parsed and compiled prior to it being shown to the site visitor. In case the output code does not change however, that is the case with Internet sites that display the same content at all times, such actions trigger unneeded reading and writing. What APC does is that it caches the already compiled code and delivers it each time visitors browse an Internet site, so the database does not have to be accessed and the program code does not have to be parsed and compiled repeatedly, which in turn minimizes the Internet site loading time. The module can be pretty efficient for informational sites, blogs, portfolios, etc.