CPU, or Central Processing Unit, is that element of a computer system or a web server which performs all the calculations. Every single CPU runs at a certain speed and the bigger it is, the speedier everything will be processed, so if you host resource-demanding web programs on a web server, for example, a quick processor will allow them to be carried out more quickly, which will significantly contribute to the entire user experience. The new generations of CPUs have two and more cores, each one operating at a particular speed to ensure a much better and swifter performance. Such architecture allows the processor to control numerous processes simultaneously or a number of cores to control 1 process if it needs extra computing power in order to be completed. Of course, other variables including the amount of RAM or the connection that a given hosting server uses could also affect the overall performance of the sites hosted on it.