First Last wrote: > > Are there any other compressed bitmap index implementations which offer > bit > map compression at a decent performance assuming filters are sparse? >
Have a look at EWAH by Daniel Lemire google: http://code.google.com/p/javaewah/ http://code.google.com/p/javaewah/ research paper: http://arxiv.org/abs/0901.3751 http://arxiv.org/abs/0901.3751 code: https://github.com/lemire/javaewah/tree/ https://github.com/lemire/javaewah/tree/ Gabriel -- View this message in context: http://lucene.472066.n3.nabble.com/is-OpenBitSet-SortedVIntList-compressed-bit-map-index-tp2213863p2983908.html Sent from the Lucene - Java Users mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
