CPU, that is oftentimes called just "processor", is an abbreviation for Central Processing Unit. That is the core of every personal computer or server, due to the fact that it carries out all of the calculations and logical input/output procedures. Despite the fact that that the performance of a site or an application relies on other things as well, like the amount of physical memory or the online connectivity of the server, the rate at which a particular processor operates determines how quickly an application shall be executed. Later-generation processors have multiple cores that can drastically boost their overall power and efficiency, as each core can control several processes individually or a number of cores can deal with 1 process that needs a significant processing power. As each and every core operates at a specific speed, this architecture can be seen as a number of independent processors cooperating.