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https://issues.apache.org/jira/browse/SOLR-8858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15363681#comment-15363681
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David Smiley commented on SOLR-8858:
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bq. a.) Always cache an entire document, regardless of what we return from
`doc()`. (Seems like it adds overhead.)
I think caching the full doc is expected and what I thought it did. There
isn't necessarily overhead; maybe some other component (e.g. highlighting)
wants a field even though 'fl' doesn't refer to it. "b" seems fine, too, not
sure, but I think "c" (always lazy-load) is bad.
> SolrIndexSearcher#doc() Completely Ignores Field Filters Unless Lazy Field
> Loading is Enabled
> ---------------------------------------------------------------------------------------------
>
> Key: SOLR-8858
> URL: https://issues.apache.org/jira/browse/SOLR-8858
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.6, 4.10, 5.5
> Reporter: Caleb Rackliffe
> Labels: easyfix
>
> If {{enableLazyFieldLoading=false}}, a perfectly valid fields filter will be
> ignored, and we'll create a {{DocumentStoredFieldVisitor}} without it.
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