CPU, which is sometimes called just "processor", is an abbreviation for Central Processing Unit. That's the core of every computer or hosting server, due to the fact that it runs all of the calculations and logical input/output procedures. Despite the fact that that the performance of an Internet site or an application relies on other things also, including the amount of physical memory or the online connectivity of the hosting server, the rate at which a certain processor performs determines how fast an application shall be executed. Later-generation processors have a number of cores that can drastically improve their overall power and efficiency, because each and every core can handle numerous processes separately or a number of cores can control 1 process which requires a substantial processing power. Because every single core runs at a particular speed, this architecture can be viewed as numerous separate processors cooperating.