How to distinguish between "premature optimization" and "performance by design"

gaearon / ama

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How to distinguish between "premature optimization" and "performance by design" #125

Closed amio closed 8 years ago

amio commented 8 years ago

Those two concepts are both correct, they wouldn't conflict unless people are abusing one of them. But how to determine whether an approach is an abuse of one of them? Is there any rules to (help) distinguish between them?