Whether a design is "done right" is about a lot more than just performance. Even being able to distinguish between good and bad design requires some considerable training -- ideally, both in computer science theory and in practical experience.

i thought we were talking about programming, not architecture or any other software engineering.

Precisely the same comments apply. Even the quality of two different implementations of the same algorithm can vary on a lot more dimensions than simply performance.

what are you talking about?

vary on lot more dimensions?? that's obvious. different people will code differently.

the point is performance which may suffer due to bad algorithmic knowledge or coding skills or due to the tradeoff for time to market. If you write a bad program it will not perform well. It's obvious.

don't really understand how you think or why you need to answer to something I am not saying.