CPU, which is oftentimes called just "processor", is an abbreviation for Central Processing Unit. That is the core of each and every computer or hosting server, because it carries out all of the calculations and logical input/output procedures. Even though the performance of a site or an application relies on other things as well, including the amount of physical memory or the online connectivity of the hosting server, the pace at which a particular processor runs determines how soon an app will be executed. Later-generation processors have a number of cores that can severely improve their overall power and efficiency, due to the fact that each core can handle several processes independently or a number of cores can handle one process that requires a sizeable computing power. Due to the fact that each and every core functions at a particular speed, this architecture can be seen as a few separate processors working together.