"WP Fastest Cache - Do You Need Speed?
This plugin creates static html files from your dynamic
WordPress blog. When a page is rendered, php and mysql
are used. Therefore, system needs RAM and CPU. If many
visitors come to a site, system uses lots of RAM and CPU
so page is rendered so slowly. In this case, you need a
cache system not to render page again and again. Cache
system generates a static html file and saves. Other
users reach to static html page...!"