Alternative PHP Cache, or APC, is a module for Apache servers which is used to cache the output code of script apps. It is very efficient for scripts with large source code and could speed up such a website as much as three times. PHP websites are dynamic and any time a visitor opens a web page, the script links to a database to get some content, after that the code is parsed and compiled before it is displayed to the visitor. If the output code doesn't change however, that's the case with websites that show the same content at all times, such actions trigger excessive reading and writing. What APC does is that it caches the previously compiled program code and delivers it each time visitors browse a website, so the database doesn't need to be accessed and the program code doesn't need to be parsed and compiled continuously, that in turn lowers the Internet site loading time. The module can be very effective for informational websites, blogs, portfolios, and so on.