Adrien Grand created LUCENE-4239: ------------------------------------ Summary: Provide access to PackedInts' low-level blocks <-> values conversion methods Key: LUCENE-4239 URL: https://issues.apache.org/jira/browse/LUCENE-4239 Project: Lucene - Java Issue Type: Improvement Components: core/other Reporter: Adrien Grand Assignee: Adrien Grand Priority: Minor Fix For: 4.0
In LUCENE-4161 we started to make the {{PackedInts}} API more flexible so that codecs could use it whenever they need to (un)pack integers. There are two posting formats in progress (For and PFor, LUCENE-3892) that perform a lot of integer (un)packing but the current API still has limits : - it only works with long[] arrays, whereas these codecs need to manipulate int[] arrays, - the packed reader iterators work great for unpacking long sequences of integers, but they would probably cause a lot of overhead to decode lots of short integer sequences such as the ones that can be generated by For and PFor. I've been looking at the For/PFor branch and it has a {{PackedIntsDecompress}} class (http://svn.apache.org/repos/asf/lucene/dev/branches/pforcodec_3892/lucene/core/src/java/org/apache/lucene/codecs/pfor/PackedIntsDecompress.java) which is very similar to {{oal.util.packed.BulkOperation}} (package-private), so maybe we should find a way to expose this class so that the For/PFor branch can directly use it. -- 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