CPU, or Central Processing Unit, is that part of a computer system or a web server that carries out each of the calculations. Each and every CPU functions at a specific speed and the bigger it is, the quicker everything shall be processed, so if you host resource-demanding web applications on a server, for instance, a quick processor shall allow them to be carried out speedier, which will considerably contribute to the whole user experience. The more recent generations of CPUs have two and more cores, each of them running at a specific speed to ensure a superior and speedier performance. This kind of architecture allows the processor to manage numerous processes at one time or a number of cores to manage a single process if it requires additional computing power to be executed. However, other factors including the amount of RAM or the connection that a particular hosting server uses may also affect the performance of the websites hosted on it.