CPU, or Central Processing Unit, is that part of a computer or a web server which performs all of the calculations. Each and every CPU runs at a particular speed and the larger it is, the speedier everything will be processed, so in case you host resource-demanding web programs on a server, for instance, a powerful processor will enable them to be carried out quicker, which will tremendously contribute to the overall user experience. The modern generations of CPUs have 2 and more cores, each working at a particular speed to guarantee a much better and quicker performance. This sort of architecture makes it possible for the processor to handle numerous processes all at once or several cores to control one process if it requires more computing power in order to be carried out. Naturally, additional factors such as the amount of RAM or the connection that a specific web server uses may also affect the efficiency of the sites hosted on it.