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2 points by Pauan 3663 days ago | link | parent

As promised, here are the benchmarks for unsorted arrays: http://pastebin.com/raw.php?i=DyTHMHNZ

You can also see it in chart form: http://i.imgur.com/BI0NDoD.png

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So, today I learned that cons cells, despite having O(n) behavior, are really fast. They outperform mutable JS arrays at random inserts!

It's only once you get up to ~100 elements that AVL trees start to outperform cons cells. A good optimization would be to use cons cells for small lists, and then automatically switch to AVL trees once the list grows to be a certain size.