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zenogantner / MyMediaLite

recommender system library for the CLR (.NET)
http://mymedialite.net
502 stars 192 forks source link

think about where we can use bitmaps to speed up things #343

Closed zenogantner closed 11 years ago

zenogantner commented 11 years ago

http://lemire.me/blog/archives/2012/10/23/when-is-a-bitmap-faster-than-an-integer-list/

http://code.google.com/p/csharpewah/

zenogantner commented 11 years ago

Did some thinking. Seems like bitmaps make sense for not-so-sparse domains. Closing.