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https://jira.codehaus.org/browse/MINDEXER-69?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Fedorenko updated MINDEXER-69:
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Attachment: 0001-MINDEXER-69-reuse-rewritten-query-for-all-artifacts.patch
DefaultIteratorResultSet executed Query#rewrite(IndexReader) for each
ArtifactInfo/MatchHighlightRequest. This was always redundant, but in Lucene
3.0.3 (and likely earlier) Query#rewrite was relatively inexpensive and
redundant calls did not cause obvious problems.
In Lucene 3.6.1 Query#rewrite performance comparably with earlier version for
one indexing context but becomes slower as number of indexing contexts involved
in the search grows.
The proposed solution is to invoke Query#rewrite only once for each
MatchHighlightRequest and then reuse the same rewritten query for all
ArtifactInfo
> Severe keyword serach performance regression
> ---------------------------------------------
>
> Key: MINDEXER-69
> URL: https://jira.codehaus.org/browse/MINDEXER-69
> Project: Maven Indexer
> Issue Type: Bug
> Affects Versions: 5.0.0
> Reporter: Igor Fedorenko
> Attachments:
> 0001-MINDEXER-69-reuse-rewritten-query-for-all-artifacts.patch
>
>
> I have a performance regression test evaluates performance of keyword search
> from 15 indexes of various sizes. Everything else being equal, I see ~2.3
> times performance drop going from maven indexer 4.1.2 to 5.0.0. I'll attach
> proposed patch with analysis of the problem shortly.
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