"Build it, release it, analyse it and only then decide if it needs optimising." I think it depends from company culture. The thing is if you don't do it right

"Build it, release it, analyse it and only then decide if it needs optimising." I think it depends from company culture. The thing is if you don't do it right with first go you will have hard time to get it done later. What management cares if it works, it's your responsibility to make it right from the start and they probably won't give you time to make some refactoring/optimizations later, because time is money :(. Sometimes it's hard to explain consequences. I have seen this too many times. I believe you need to find golden middle, by not trying to hack things to much or overengineering problem, though sometimes is hard to define where is this middle.