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https://issues.apache.org/jira/browse/SOLR-2950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13168900#comment-13168900
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Yonik Seeley commented on SOLR-2950:
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It would probably be most performant to do the lookup perSegment (i.e. in
setNextReader) and remove documents as they are found (i.e. if the doc exists
in segment1, don't bother looking it up in further segments). This will also
mean that we only do hash lookups in the SentinelIntSet when there actually
exists a boosted doc in the segment.
> QueryElevationComponent needlessly looks up document ids
> --------------------------------------------------------
>
> Key: SOLR-2950
> URL: https://issues.apache.org/jira/browse/SOLR-2950
> Project: Solr
> Issue Type: Improvement
> Reporter: Grant Ingersoll
> Assignee: Grant Ingersoll
> Priority: Minor
> Fix For: 3.6, 4.0
>
>
> The QueryElevationComponent needlessly instantiates a FieldCache and does
> look ups in it for every document. If we flipped things around a bit and got
> Lucene internal doc ids on inform() we could then simply do a much smaller
> and faster lookup during the sort.
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