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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12654828#action_12654828
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Yonik Seeley commented on LUCENE-1483:
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bq. Okay, I straightened things out, and now it looks like possibly no loss
So if there was a 17% loss on the optimized index, and very little loss on a
segmented index, I assume that means that matching/scoring is enough slower on
the segmented index that the loss in sorting performance doesn't matter as much?
> Change IndexSearcher to use MultiSearcher semantics for sorted searches
> -----------------------------------------------------------------------
>
> Key: LUCENE-1483
> URL: https://issues.apache.org/jira/browse/LUCENE-1483
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.9
> Reporter: Mark Miller
> Priority: Minor
> Attachments: LUCENE-1483.patch
>
>
> Here is a quick test patch. FieldCache for sorting is done at the individual
> IndexReader level and reloading the fieldcache on reopen can be much faster
> as only changed segments need to be reloaded.
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