9CPU ARCHITECTURE
Without question, the design of the central processing unit (CPU) has the greatest impact on the performance of your software. To execute a particular instruction (or command), a CPU requires a certain amount of electronic circuitry specific to that instruction. As you increase the number of instructions the CPU can support, you also increase the CPU’s complexity and the amount of circuitry, or logic gates, needed to execute them. Therefore, to keep the number of logic gates and the associated costs reasonably small, CPU designers must restrict the number and complexity of the instructions the CPU can execute. This is known as ...
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