One undesirable property of optimizers is that in theory one day they produce go... | Hacker News

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		amelius 49 days ago \| parent \| context \| favorite \| on: You can't fool the optimizer One undesirable property of optimizers is that in theory one day they produce good code and the next day they don't.

titzer 49 days ago [–]

These situations are known as "performance cliffs" and they are particularly pernicious in optimizing dynamic languages like JavaScript, where runtime optimization happens that depends not just on the program's shape, but its past behavior.

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