Alternative PHP Cache, or APC, is a module for Apache servers that is used to cache the output code of script applications. It is very effective for scripts with large source code and will boost such a website up to three times. PHP websites are dynamic and whenever a visitor accesses some web page, the script hooks up to a database in order to get some content, after that the code is parsed and compiled prior to it being shown to the site visitor. If the output code doesn't change however, that is the case with Internet sites that display the very same content at all times, such actions trigger excessive reading and writing. What APC does is that it caches the previously compiled code and delivers it each time visitors browse an Internet site, so the database does not need to be accessed and the program code does not need to be parsed and compiled over and over again, which consequently decreases the Internet site loading time. The module can be rather useful for informational sites, blogs, portfolios, and so on.