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https://issues.apache.org/jira/browse/SOLR-12366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16483501#comment-16483501
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David Smiley commented on SOLR-12366:
-------------------------------------
Updated the patch:
* replaced the implementation of SolrIndexSearcher.getFirstMatch to be in terms
of lookupId -- less to maintain and one fewer reference to the
SlowCompositeReader (field "filterReader"). Slightly faster probably.
* simplified getLiveDocsBits further
* renamed getLiveDocs to getLiveDocSet (thus changed a bunch of other files)
but kept the original and marked deprecated, to be removed in 8.0
> Avoid SlowAtomicReader.getLiveDocs -- it's slow
> -----------------------------------------------
>
> Key: SOLR-12366
> URL: https://issues.apache.org/jira/browse/SOLR-12366
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: search
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
> Attachments: SOLR-12366.patch, SOLR-12366.patch, SOLR-12366.patch,
> SOLR-12366.patch
>
>
> SlowAtomicReader is of course slow, and it's getLiveDocs (based on MultiBits)
> is slow as it uses a binary search for each lookup. There are various places
> in Solr that use SolrIndexSearcher.getSlowAtomicReader and then get the
> liveDocs. Most of these places ought to work with SolrIndexSearcher's
> getLiveDocs method.
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