Mikhail Khludnev created LUCENE-4571:
----------------------------------------
Summary: speedup disjunction with minShouldMatch
Key: LUCENE-4571
URL: https://issues.apache.org/jira/browse/LUCENE-4571
Project: Lucene - Core
Issue Type: Improvement
Components: core/search
Affects Versions: 4.1
Reporter: Mikhail Khludnev
even minShouldMatch is supplied for DisjunctionSumScorer it enumerates whole
disjunction, and verifies minShouldMatch condition [on every
doc|https://github.com/apache/lucene-solr/blob/trunk/lucene/core/src/java/org/apache/lucene/search/DisjunctionSumScorer.java#L70]:
{code}
public int nextDoc() throws IOException {
assert doc != NO_MORE_DOCS;
while(true) {
while (subScorers[0].docID() == doc) {
if (subScorers[0].nextDoc() != NO_MORE_DOCS) {
heapAdjust(0);
} else {
heapRemoveRoot();
if (numScorers < minimumNrMatchers) {
return doc = NO_MORE_DOCS;
}
}
}
afterNext();
if (nrMatchers >= minimumNrMatchers) {
break;
}
}
return doc;
}
{code}
[~spo] proposes (as well as I get it) to pop nrMatchers-1 scorers from the heap
first, and then push them back advancing behind that top doc. For me the
question no.1 is there a performance test for minShouldMatch constrained
disjunction.
--
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
