CPU, or Central Processing Unit, is that element of a home PC or a web server that runs each of the calculations. Each and every CPU runs at a certain speed and the larger it is, the sooner everything will be processed, so in case you host resource-demanding web apps on a server, for example, a fast processor shall enable them to be carried out more quickly, which will greatly contribute to the entire user experience. The new generations of CPUs have 2 and more cores, each operating at a specific speed to ensure a better and swifter performance. This sort of architecture enables the processor to control various processes simultaneously or several cores to control 1 process if it requires more computing power in order to be performed. Obviously, other elements such as the amount of RAM or the connection which a given web server uses can also affect the overall performance of the Internet sites hosted on it.