CPU, which is oftentimes called just "processor", is an abbreviation for Central Processing Unit. This is the core of any personal computer or web server, since it performs each of the calculations and logical input/output functions. Though the performance of a site or an app relies upon other things also, such as the amount of physical memory or the online connectivity of the server, the pace at which a specific processor runs determines how quick an app will be executed. Later-generation processors have several cores that can seriously boost their overall power and efficiency, due to the fact that each and every core can take on a number of processes individually or a few cores can control one process which requires a significant computing power. As each core works at a certain speed, this architecture can be looked at as a number of individual processors working together.