All arithmetical and logical procedures in a computer/server configuration are addressed by its Central Processing Unit, or CPU. This hardware element is typically called the "brains" of the personal computer as well. The pace at which the CPU completes system instructions is also referred to as its speed and it is measured in Hertz. The speedier the processing unit is, the faster scripts and web applications will be executed, though the performance of the latter depends upon other things also - the read/write speed of the hard disk, the amount of physical memory, the network connection, and so on. All modern CPUs have numerous cores, which work together. Thus, the overall performance and the workload that a CPU can handle increase, since each and every core can process different tasks independently and a number of cores can handle one task that can't be processed by 1 core.
