Performance
The first part of this chapter discusses optimization from the performance viewpoint. Here not only software and hardware characteristics are discussed, but also how performance is perceived by users of a system.
What Is Performance?
What does performance actually mean in relation to software? The simple answer is that performance is an expression of the amount of work that is done during a certain period of time. The more work a program does per unit of time, the better its performance. Put differently, the performance of a program is measured by the number of input (data) units it manages to transform into output (data) units in a given time. This translates directly into the number of algorithmic steps that need to be taken to ...
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