In computing, Optimization is the process of modifying a system to make some features of it work more efficiently or use fewer resources. For Instance, A computer program May Be Optimized So That It Runs Faster, or to run with less memory requirements Or Other Resources (See Space-time trade off), or to Consume Less energy. This Is a Branch Of software engineering.

The Optimized System May Be A Single computer program, A Collection Of computers Or Even An Entire Network Such As The Internet. 

The Optimization Is Generally Recommended To Leave Until The End Of The Process Of development, Since The Premature Optimization Can Introduce New Errors (Generally More Difficult To Detect For Being Of Algorithmic Nature).