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https://issues.apache.org/jira/browse/LUCENE-5493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13923772#comment-13923772
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Michael McCandless commented on LUCENE-5493:
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bq. What is meant by "impact sorted postings"?
It's when you sort your documents according to biggest "impact" which is your
own measure, and which you intend to sort by at search time.
AnalyzingInfixSuggester uses this, to sort the suggestions by their weight.
This way if you are looking for 5 suggestions, you can stop searching after
collecting 5 hits, which is an enormous speedup when the query would have
otherwise matched many documents.
See e.g. http://nlp.stanford.edu/IR-book/html/htmledition/impact-ordering-1.html
> Rename Sorter, NumericDocValuesSorter, and fix javadocs
> -------------------------------------------------------
>
> Key: LUCENE-5493
> URL: https://issues.apache.org/jira/browse/LUCENE-5493
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Assignee: Robert Muir
> Attachments: LUCENE-5493-poc.patch, LUCENE-5493.patch
>
>
> Its not clear to users that these are for this super-expert thing of
> pre-sorting the index. From the names and documentation they think they
> should use them instead of Sort/SortField.
> These need to be renamed or, even better, the API fixed so they aren't public
> classes.
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