Alternative PHP Cache, or APC, is a module for Apache web servers that is employed to cache the output code of script applications. It is very efficient for scripts with large source code and will boost such a site up to three times. PHP websites are dynamic and whenever a website visitor accesses some web page, the script connects to a database to retrieve some content, after that the code is parsed and compiled before it is displayed to the guest. If the output code does not change however, that is the case with Internet sites that show identical content all of the time, such actions result in unneeded reading and writing. What APC does is that it caches the already compiled code and delivers it every time visitors browse a website, so the database doesn't need to be accessed and the code doesn't have to be parsed and compiled again and again, that in turn lowers the website loading time. The module could be really useful for informational Internet sites, blogs, portfolios, and many others.