> Improvements welcome.

Performance wise?

I think a pre computed lookup table is the way I'd go.

An array with 2**16 entries should be a good compromise between time and memory complexity.

(Since Perl doesn't fit into a CPU's line cache)

Sorry too busy to code it for you :)

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

In reply to Re: How to do popcount (aka Hamming weight) in Perl by LanX
in thread How to do popcount (aka Hamming weight) in Perl (popcount References) by eyepopslikeamosquito

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