why separating the fetchexecution cycle into different fetch

why separating the fetch-execution cycle into different fetch and execution units improves CPU performance.

Solution

It reduces fetch executon cycles by reducng the number of fetch executioncycles.This resulted in improved efficiency which lead to better performance

It reduced the time which was involved before in performing more number of fetch and execution operations

It reduced the cost of operation by repeatadly performing fetch and execution operation and improved overall CPU performance and life.