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re: Using the big O notation in the wild VIEW POST

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re: well. it could be a hash table, but then it's even worse (for big n-s) as with hash table and big n-s there will be hash collisions, so it needs to...

Hmm, I wonder at what n you start to get enough collisions for it to matter in practice. I guess it is up to the implementation, and up to the browsers to create a good heuristic.

When I have used SpiderMonkey (and node.js to some extent) solve problems on kattis, I have never run into a problem of object lookup being a bottleneck. Maybe in some special case?

in practice it never causes problem
i suspect modern js engines are able to switch implementation based on the object "shape"

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