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 could speed up such a site up to 3 times. PHP websites are dynamic and any time a website visitor accesses a web page, the script connects to a database in order to get some content, after that the code is parsed and compiled prior to it being displayed to the guest. If the output code doesn't change however, that's the case with websites which show the very same content at all times, such actions trigger excessive reading and writing. What APC does is that it caches the already compiled program code and delivers it every time visitors browse a website, so the database does not need to be accessed and the code does not need to be parsed and compiled again and again, that consequently reduces the Internet site loading time. The module could be extremely useful for informational Internet sites, blogs, portfolios, and many others.