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Sep 13, 2021 at 14:24 comment added Gangula running the tests from Mark Byers Answer, numpy took the longest of all answers (ars, SuperNova, Mark Byers, Matt b).
Apr 29, 2017 at 7:06 comment added den.run.ai i updated the notebook in the link and also the screenshot. Surprisingly pandas is slower than numpy even when switching to hashtable internally. Partly this maybe due to upcasting to int64.
Apr 29, 2017 at 7:04 history edited den.run.ai CC BY-SA 3.0
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Aug 7, 2015 at 15:30 history answered den.run.ai CC BY-SA 3.0