Yep, many (especially younger) programmers don't get the "feel" for how fast things should run and as a result often "optimize" things horribly by either "scali

Yep, many (especially younger) programmers don't get the "feel" for how fast things should run and as a result often "optimize" things horribly by either "scaling out" i.e. running things on clusters way larger than the problem justifies or putting queuing in front and dealing with the wait.