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https://issues.apache.org/jira/browse/SOLR-2950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163661#comment-13163661
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Yonik Seeley commented on SOLR-2950:
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Instead of doing everything on inform (which isn't great for NRT), we should
just do it on-demand in the comparator in setNextReader() for only those
uniqueKeys that were boosted)
We could cache the uniqueKey -> docid across queries, but not sure it's worth
it at this point (assuming at most a handful of docs are boosted per-query).
And if we did want some sort of uniqueKey -> docid cache it would make most
sense to be an internal cache in SolrIndexSearcher, not private to the QEC.
> 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
> 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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