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https://issues.apache.org/jira/browse/SOLR-13348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16803211#comment-16803211
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Ishan Chattopadhyaya commented on SOLR-13348:
---------------------------------------------
This is an impressive speedup! Thanks for a working patch. In case someone
doesn't get to this before me, I'll have some time to review and commit this
next week.
> CollapsingQParserPlugin should not run scorer for documents not eligible for
> collapsing
> ---------------------------------------------------------------------------------------
>
> Key: SOLR-13348
> URL: https://issues.apache.org/jira/browse/SOLR-13348
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: search
> Affects Versions: 8.0, master (9.0)
> Reporter: Andrzej Wislowski
> Priority: Major
> Attachments: SOLR-13348.patch
>
>
> CollapsingQParserPlugin should not run scorer for documents not eligible for
> collapsing (in cases when score is not needed for collapsing operation) but
> only for the result sorting, decoration of result fields or boosting.
>
> Performance improvement example:
> 2_000_000 documents collapsed by sort without score to 130_000 then sorted by
> score improved from 4300ms to 2700ms
>
> I am attaching patch on master branch.
>
>
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