CPU, or Central Processing Unit, is that component of a computer or a web server which performs each of the calculations. Each and every CPU functions at a particular speed and the larger it is, the faster everything shall be processed, so if you host resource-demanding web programs on a web server, for example, a quick processor will enable them to be performed faster, which will considerably contribute to the overall user experience. The current generations of CPUs have two and more cores, each one working at a specific speed to guarantee a much better and speedier performance. This sort of architecture makes it possible for the processor to control various processes concurrently or a number of cores to manage 1 process if it requires more computing power in order to be carried out. Naturally, other factors including the amount of RAM or the connection that a specific hosting server uses could also affect the performance of the sites hosted on it.