CPU, or Central Processing Unit, is that part of a personal computer or a web server that performs each of the calculations. Every CPU runs at a specific speed and the higher it is, the speedier everything shall be processed, so when you host resource-demanding web programs on a web server, for example, a quick processor will enable them to be performed more quickly, which will tremendously contribute to the overall user experience. The new generations of CPUs have two and more cores, each of them operating at a certain speed to guarantee a superior and quicker performance. This type of architecture permits the processor to control a variety of processes all at once or several cores to address a single process if it requires extra computing power in order to be executed. Needless to say, other elements such as the amount of RAM or the connection a specific web server uses can also affect the overall performance of the Internet sites hosted on it.