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Michael McCandless commented on LUCENE-1849: -------------------------------------------- bq. Any stats on the performance gains here available? I think somewhere in LUCENE-1483 is the answer to this question, but I can't find it now. (We need a whole new search index just for that issue alone!). But the optimization currently only applies if the query contains just SHOULD terms plus up to 32 MUST_NOT terms. More testing here would be great... the specialized search in LUCENE-1594 also uses out-of-order collection for certain AND queries but I haven't confirmed if/when that's a win. {quote} Also, are the implications of out of order docids coming back from nextDoc() well documented (javadoc?, wiki?)? I guess out of order docids really screw up advance(int), so you should never call advance(int) if you allowed out of order collection for a Scorer? {quote} Out-of-order scoring is only used for top-scorers today in Lucene, so nextDoc/advance are not used. (Though: BooleanScorer, which provides docs out-of-order, is I think able to nextDoc() through the out-of-order docs, but I don't think we take advantage of that anywhere, though we could do so to improve performance of BooleanQuery as a sub-clause of BooleanQuery). > Add OutOfOrderCollector and InOrderCollector subclasses of Collector > -------------------------------------------------------------------- > > Key: LUCENE-1849 > URL: https://issues.apache.org/jira/browse/LUCENE-1849 > Project: Lucene - Java > Issue Type: Wish > Components: Search > Affects Versions: 2.9 > Reporter: Tim Smith > Priority: Minor > Fix For: 2.9 > > > I find myself always having to implement these methods, and i always return a > constant (depending on if the collector can handle out of order hits) > would be nice for these two convenience abstract classes to exist that > implemented acceptsDocsOutOfOrder() as final and returned the appropriate > value -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org For additional commands, e-mail: java-dev-h...@lucene.apache.org