CPU, or Central Processing Unit, is that component of a computer system or a web server that performs each of the calculations. Each and every CPU functions at a certain speed and the larger it is, the faster everything will be processed, so if you host resource-demanding web applications on a hosting server, for example, a powerful processor shall allow them to be performed much faster, which will greatly contribute to the whole user experience. The newer generations of CPUs have 2 and more cores, each one functioning at a certain speed to guarantee a superior and swifter performance. This sort of architecture permits the processor to handle numerous processes simultaneously or a number of cores to control one process if it requires additional computing power in order to be carried out. Naturally, additional factors including the amount of RAM or the connection which a given web server uses could also affect the performance of the websites hosted on it.