Alternative PHP Cache, or APC, is a module for Apache servers that is employed to cache the output code of script applications. It is very effective for scripts with large source code and could boost such an Internet site up to 3 times. PHP websites are dynamic and each time a user opens a page, the script links to a database in order to retrieve some content, then the code is parsed and compiled before it is shown to the visitor. If the output code doesn't change however, that's the case with sites which display identical content at all times, such actions trigger unnecessary reading and writing. What APC does is that it caches the previously compiled code and delivers it any time visitors browse a site, so the database does not need to be accessed and the program code doesn't have to be parsed and compiled over and over again, that in turn lowers the Internet site loading time. The module could be quite effective for informational sites, blogs, portfolios, and so on.