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https://issues.apache.org/jira/browse/SOLR-10732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Gibney updated SOLR-10732:
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Attachment: SOLR-10732.patch
> potential optimizations in callers of SolrIndexSearcher.numDocs when docset
> is empty
> ------------------------------------------------------------------------------------
>
> Key: SOLR-10732
> URL: https://issues.apache.org/jira/browse/SOLR-10732
> Project: Solr
> Issue Type: Improvement
> Reporter: Chris M. Hostetter
> Priority: Major
> Attachments: SOLR-10732.patch, SOLR-10732.patch
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> spin off of SOLR-10727...
> {quote}
> ...why not (also) optimize it slightly higher up and completely avoid the
> construction of the Query objects? (and in some cases: additional overhead)
> for example: the first usage of {{SolrIndexSearcher.numDocs(Query,DocSet)}} i
> found was {{RangeFacetProcessor.rangeCount(DocSet subset,...)}} ... if the
> first line of that method was {{if (0 == subset.size()) return 0}} then we'd
> not only optimize away the SolrIndexSearcher hit, but also fetching the
> SchemaField & building the range query (not to mention the much more
> expensive {{getGroupedFacetQueryCount}} in the grouping case)
> At a glance, most other callers of
> {{SolrIndexSearcher.numDocs(Query,DocSet)}} could be trivially optimize this
> way as well -- at a minimum to eliminate Query parsing/construction.
> {quote}
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