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https://issues.apache.org/jira/browse/SOLR-12366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16480048#comment-16480048
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David Smiley commented on SOLR-12366:
-------------------------------------

When I tested locally, I got no reproducing test failures.

> 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
>
>
> 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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