CPU, or Central Processing Unit, is that element of a personal computer or a web server which performs each of the calculations. Every CPU operates at a specific speed and the larger it is, the sooner everything will be processed, so if you host resource-demanding web applications on a hosting server, for instance, a quick processor shall allow them to be carried out more quickly, which will drastically contribute to the entire user experience. The newer generations of CPUs have 2 and more cores, each of them working at a specific speed to guarantee a better and swifter performance. This kind of architecture permits the processor to control various processes at one time or a number of cores to control 1 process if it requires extra computing power to be completed. However, other variables such as the amount of RAM or the connection which a specific server uses could also affect the performance of the web sites hosted on it.