On Mon, 31 Jan 2022, Vanessa McHale wrote:
q/k is faster, I think because it’s ordered by default - maybe something like ordered dataframes could be implemented in J?
What do you mean by ordered? Sorted? I know some versions of k will track when an array is sorted. But at the volumes they work at I would be surprised if they were able to keep columns sorted.
One thing I am pretty sure they do is to use smaller integers, and wrapping semantics (no overflow checking). I don't know if this is responsible for the difference.
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