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https://issues.apache.org/jira/browse/SOLR-17349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17864231#comment-17864231
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ASF subversion and git services commented on SOLR-17349:
--------------------------------------------------------
Commit 9a86b2102ef28f603a08fa7fdae153e7ae834960 in solr's branch
refs/heads/main from Michael Gibney
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=9a86b2102ef ]
SOLR-17349: (adjusted) SolrDocumentFetcher should always skip lazy field
loading overhead if documentCache==null (#2551)
* SOLR-17349: (adjusted) SolrDocumentFetcher should always skip lazy field
loading overhead if documentCache==null
this also reverts the code change from 390c30ff56ad354a6ee55eaae54713dd8ec4cce3,
which is obviated by directly making `enableLazyFieldLoading` conditional
on presence of `documentCache`.
> SolrDocumentFetcher should always skip lazy field loading overhead if
> documentCache==null
> -----------------------------------------------------------------------------------------
>
> Key: SOLR-17349
> URL: https://issues.apache.org/jira/browse/SOLR-17349
> Project: Solr
> Issue Type: Improvement
> Affects Versions: main (10.0), 8.11.3, 9.6.1
> Reporter: Michael Gibney
> Assignee: Michael Gibney
> Priority: Minor
> Fix For: 9.7
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> SolrDocumentFetcher currently still adds some overhead for lazy loading of
> stored fields, even when there is no documentCache, in which case iiuc lazy
> field loading should be irrelevant.
> I stumbled across this while looking into a [problem reported on the
> solr-users
> list|https://lists.apache.org/thread/myd6ckfd61xmdh2087or1to3t3m2flyn]. The
> connection to the reported problem is still a bit mysterious (there are
> as-yet-unexplained magic numbers involved), but in some cases at least, the
> reported performance degradation was quite significant, and the reported
> workaround circumstantially supports this change as a possible fix.
> I think this change is a positive one regardless; and if it ends up fixing
> the reported issue, so much the better!
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