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Shai Erera commented on LUCENE-4609: ------------------------------------ Few comments about the patch: * instead of iterating from 0 to length and doing values.ints[values.offset + i], you can compute 'upto' once and iterate from values.offset to upto? * is {{if (v & 0xFF) == 0)}} better than {{if (v <= 256)}}? we could test of course ... * I think that doing v - 256 is a good idea? You anyway do dgap, so what's another '-' (and '+' in decoder)? * Maybe add a test to EncodingTest? Just to be sure it passes the random testing? > Write a PackedIntsEncoder/Decoder for facets > -------------------------------------------- > > Key: LUCENE-4609 > URL: https://issues.apache.org/jira/browse/LUCENE-4609 > Project: Lucene - Core > Issue Type: New Feature > Components: modules/facet > Reporter: Shai Erera > Priority: Minor > Attachments: LUCENE-4609.patch, LUCENE-4609.patch, LUCENE-4609.patch, > LUCENE-4609.patch, LUCENE-4609.patch, SemiPackedEncoder.patch > > > Today the facets API lets you write IntEncoder/Decoder to encode/decode the > category ordinals. We have several such encoders, including VInt (default), > and block encoders. > It would be interesting to implement and benchmark a > PackedIntsEncoder/Decoder, with potentially two variants: (1) receives > bitsPerValue up front, when you e.g. know that you have a small taxonomy and > the max value you can see and (2) one that decides for each doc on the > optimal bitsPerValue, writes it as a header in the byte[] or something. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org