That's why you measure first, and only if necessary go to these extreme measures if you find that this is the place that really costs you performance. Or if pe

That's why you measure first, and only if necessary go to these extreme measures if you find that this is the place that really costs you performance. Or if performance is basically your only goal (HFT) then you just need to spend this time on a lot of parts of your code. But then in 99% of code it's a waste of time.