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HyperLogLog cardinality counter

Project description

Python implementation of the Hyper LogLog and Sliding Hyper LogLog cardinality counter algorithms. Added bias correction from HLL++.

http://algo.inria.fr/flajolet/Publications/FlFuGaMe07.pdf http://hal.archives-ouvertes.fr/docs/00/46/53/13/PDF/sliding_HyperLogLog.pdf http://research.google.com/pubs/pub40671.html

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