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https://issues.apache.org/jira/browse/LUCENE-8788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16847455#comment-16847455
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Jim Ferenczi commented on LUCENE-8788:
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{quote}
I like the idea [~jim.ferenczi] proposed. I can open a Jira for that and work
on a patch for it as well, unless Jim wants to do it himself?
{quote}
Something is needed for the search side and this issue is the right place to
add such functionalities. I wonder if we need an issue for the merge side
though since it's already possible to change the order of segments in a custom
FilterMergePolicy. I tried to do it in a POC and the change is trivial so I am
not sure that we need to do anything in core.
> Order LeafReaderContexts by Estimated Number Of Hits
> ----------------------------------------------------
>
> Key: LUCENE-8788
> URL: https://issues.apache.org/jira/browse/LUCENE-8788
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Atri Sharma
> Priority: Major
>
> We offer no guarantee on the order in which an IndexSearcher will look at
> segments during a search operation. This can be improved for use cases where
> an engine using Lucene invokes early termination and uses the partially
> collected hits. A better model would be if we sorted segments by the
> estimated number of hits, thus increasing the probability of the overall
> relevance of the returned partial results.
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