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Han Jiang commented on LUCENE-3892: ----------------------------------- bq. I opened LUCENE-4225 with a new base PostingsFormat that gives better perf for For than Sep... Wow, the result looks great! Quite curious why some queries improve so much, like AndHighHigh. bq. LUCENE-4161 has already taken a big step towards making them usable ... we should prototype an initial cutover and then iterate? Yes, but we should make the PostingsFormat pass test first? Currently it also fails some tests for ForPF. > Add a useful intblock postings format (eg, FOR, PFOR, PFORDelta, > Simple9/16/64, etc.) > ------------------------------------------------------------------------------------- > > Key: LUCENE-3892 > URL: https://issues.apache.org/jira/browse/LUCENE-3892 > Project: Lucene - Java > Issue Type: Improvement > Reporter: Michael McCandless > Labels: gsoc2012, lucene-gsoc-12 > Fix For: 4.1 > > Attachments: LUCENE-3892-BlockTermScorer.patch, > LUCENE-3892-direct-IntBuffer.patch, LUCENE-3892-for&pfor-with-javadoc.patch, > LUCENE-3892-for&pfor-with-javadoc.patch, > LUCENE-3892-for&pfor-with-javadoc.patch, > LUCENE-3892-for&pfor-with-javadoc.patch, LUCENE-3892-for&pfor.patch, > LUCENE-3892-handle_open_files.patch, > LUCENE-3892-pfor-compress-iterate-numbits.patch, > LUCENE-3892-pfor-compress-slow-estimate.patch, LUCENE-3892_for.patch, > LUCENE-3892_for_byte[].patch, LUCENE-3892_for_int[].patch, > LUCENE-3892_for_unfold_method.patch, LUCENE-3892_pfor.patch, > LUCENE-3892_pfor.patch, LUCENE-3892_pfor.patch, > LUCENE-3892_pfor_unfold_method.patch, LUCENE-3892_pulsing_support.patch, > LUCENE-3892_settings.patch, LUCENE-3892_settings.patch > > > On the flex branch we explored a number of possible intblock > encodings, but for whatever reason never brought them to completion. > There are still a number of issues opened with patches in different > states. > Initial results (based on prototype) were excellent (see > http://blog.mikemccandless.com/2010/08/lucene-performance-with-pfordelta-codec.html > ). > I think this would make a good GSoC project. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa 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