CPU, or Central Processing Unit, is that element of a personal computer or a server that runs all of the calculations. Each and every CPU functions at a specific speed and the larger it is, the speedier everything will be processed, so if you host resource-demanding web applications on a hosting server, for instance, a fast processor will allow them to be executed much faster, which will greatly contribute to the whole user experience. The more recent generations of CPUs have 2 and more cores, each of them operating at a particular speed to ensure a superior and swifter performance. Such architecture allows the processor to manage various processes simultaneously or a number of cores to manage one process if it needs additional computing power in order to be completed. Needless to say, other elements such as the amount of RAM or the connection which a given hosting server uses may also affect the efficiency of the Internet sites hosted on it.