CPU, that is oftentimes called just "processor", is an abbreviation for Central Processing Unit. That is the core of each laptop or computer or web server, since it runs all the calculations and logical input/output operations. Despite the fact that that the performance of an Internet site or an app depends on other things as well, such as the amount of physical memory or the connectivity of the web server, the speed at which a given processor works determines how fast an app shall be executed. Later-generation processors have a number of cores which can drastically boost their overall power and efficiency, since each and every core can handle a number of processes individually or a number of cores can handle a single process which needs a significant processing power. Due to the fact that each core runs at a certain speed, this architecture can be viewed as numerous individual processors cooperating.