[ https://issues.apache.org/jira/browse/LUCENE-3325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Paul Elschot resolved LUCENE-3325. ---------------------------------- Resolution: Won't Fix Not enough interest. > Transpose positions in index > ---------------------------- > > Key: LUCENE-3325 > URL: https://issues.apache.org/jira/browse/LUCENE-3325 > Project: Lucene - Core > Issue Type: Wish > Components: core/index > Reporter: Paul Elschot > Priority: Minor > > When positions are used in queries with many terms, each term in each > document causes a seek in the positions, and in large indexes these seeks can > be far apart even when the terms are in the same document. > The number of (disk) cache misses of such position seeks might be reduced by > putting the positions for all terms in the same document directly behind each > other. This should have a noticable effect when terms are alphabetically > close, for example for truncations, and it should also help when the > documents have few enough positions to fill a cache entry (disk page, cache > line). > This might also help the performance of highlighting based on indexed > positions. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org