CPU, that is sometimes called just "processor", is an abbreviation for Central Processing Unit. That is the core of each and every computer or server, since it carries out each of the calculations and logical input/output procedures. Though the performance of a website or an app relies on other things too, like the amount of physical memory or the connection of the hosting server, the pace at which a given processor works determines how quickly a program shall be executed. Later-generation processors have numerous cores that can severely increase their overall power and efficiency, since every core can take on numerous processes individually or several cores can take on a single process that needs a sizeable computing power. As each and every core runs at a certain speed, this architecture can be looked at as numerous independent processors working together.