CPU, or Central Processing Unit, is that part of a personal computer or a hosting server which runs all the calculations. Each and every CPU operates at a specific speed and the bigger it is, the speedier everything will be processed, so when you host resource-demanding web programs on a server, for example, a quick processor shall enable them to be executed faster, which will considerably contribute to the whole user experience. The more recent generations of CPUs have 2 and more cores, each functioning at a certain speed to guarantee a superior and faster performance. This kind of architecture makes it possible for the processor to handle numerous processes concurrently or a number of cores to manage one process if it requires extra computing power to be executed. Of course, additional factors such as the amount of RAM or the connection a given hosting server uses could also affect the performance of the web sites hosted on it.