CPU, that is oftentimes called just "processor", is an abbreviation for Central Processing Unit. This is the core of any PC or hosting server, due to the fact that it executes each of the calculations and logical input/output procedures. Despite the fact that that the performance of a site or an app is determined by other things also, such as the amount of physical memory or the connection of the server, the pace at which a specific processor runs determines how quick an application shall be executed. Later-generation processors have several cores which can considerably increase their overall power and efficiency, as every single core can handle a variety of processes individually or a few cores can deal with one process which needs a substantial processing power. Due to the fact that each core runs at a certain speed, this architecture can be seen as several separate processors cooperating.