Alternative PHP Cache, or APC, is a module for Apache web servers which is employed to cache the output code of script applications. It is very efficient for scripts with large source code and will accelerate such an Internet site as much as 3 times. PHP websites are dynamic and every time a website visitor opens a web page, the script hooks up to a database in order to get some content, then the code is parsed and compiled before it is displayed to the guest. If the output code doesn't change however, which is the case with Internet sites that display the same content at all times, such actions result in needless reading and writing. What APC does is that it caches the previously compiled program code and delivers it every time visitors browse a website, so the database does not need to be accessed and the program code does not have to be parsed and compiled over and over again, that in turn reduces the site loading time. The module could be extremely efficient for informational Internet sites, blogs, portfolios, and so on.