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Jifuna38093y@Artemix the truth has been spoken
Optimization is good,
How much time would you spend? You usually get diminishing returns. So you spend 1h, find some stuff you can make better, you get 25% improvements in speed or memory. Then you spend 1 more hour, to find a tiny place you can make better, so you get 10% improvement. And then you find a library written by some PhDs and contributed to by 100 other people, that does part of the work you do yourself. Replacing it gets you 5% more improvement. And so on...
Where do you stop?
Where do you stop making old shit fast, and instead create new shit.
How much do you charge per hour? How much hardware can you buy with that money you spent on optimization?
As a professional, you must always think about this first. Otherwise you're wasting someone else's money on your little hobby.