[erlang-questions] fast tuple sorting

Bob Ippolito bob@REDACTED
Fri May 30 17:35:38 CEST 2014

Why does it have to be a list? Why not store it in a gb_tree instead, this
way it's sorted as you build it. Another alternative would be to use an
ordered_set ets table.

On Fri, May 30, 2014 at 8:15 AM, Dmitry Kolesnikov <dmkolesnikov@REDACTED>

> Hello,
> I need to sort a list of tuples {integer(), float()} within 6 ms. the
> lists:keysort(1, X) is not fast enough for me. I am able to meet the hard
> requirement only if the list size about 10K tuples. However, my application
> needs to sort lists of 50K tuples or so.
> I doubt that any other sort algorithm implemented in Erlang would solve my
> issue. Parallel sort would not help at all because production system would
> run parallel requests of lists sorting. I am starting to think of
> offloading the sorting to NIF.
> Any thought?
> Best Regards,
> Dmitry
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