CPU, or Central Processing Unit, is that part of a computer or a hosting server that carries out each of the calculations. Each and every CPU operates at a specific speed and the bigger it is, the sooner everything will be processed, so if you host resource-demanding web programs on a hosting server, for example, a fast processor will enable them to be carried out more quickly, which will tremendously contribute to the whole user experience. The new generations of CPUs have two and more cores, each one working at a certain speed to ensure a better and speedier performance. This type of architecture enables the processor to control various processes at one time or a number of cores to control a single process if it needs additional computing power in order to be carried out. Naturally, additional factors like the amount of RAM or the connection which a particular server uses can also affect the efficiency of the sites hosted on it.