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by yen223
1988 days ago
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`map` can compile to wildly different things depending on what you're mapping over. Cache efficiency is important, but so is not running O(n^2) algorithms when you didn't mean to. The latter has an outsized impact on the performance of a program, and explicit loops makes it very clear when something's up. |
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Disagree. Explicit loops hide the essence of what's happening beneath a pile of ceremony. It's easier to spot accidentally O(n^2) code in map-style code where it's a lot clearer what the code's doing.