CPU, or Central Processing Unit, is that component of a PC or a web server that carries out all the calculations. Each and every CPU operates at a particular speed and the higher it is, the quicker everything will be processed, so if you host resource-demanding web apps on a web server, for instance, a quick processor shall enable them to be carried out quicker, which will considerably contribute to the entire user experience. The new generations of CPUs have 2 and more cores, each one operating at a certain speed to guarantee a better and speedier performance. This sort of architecture permits the processor to manage a variety of processes simultaneously or a number of cores to address one process if it needs more computing power to be carried out. Naturally, other factors such as the amount of RAM or the connection that a given web server uses can also affect the overall performance of the web sites hosted on it.