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https://issues.apache.org/jira/browse/LUCENE-6717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660077#comment-14660077
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Robert Muir commented on LUCENE-6717:
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Nice, I like it. This is a great improvement.
> TermAutomatonQuery should be two-phased
> ---------------------------------------
>
> Key: LUCENE-6717
> URL: https://issues.apache.org/jira/browse/LUCENE-6717
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Attachments: LUCENE-6717.patch
>
>
> {{TermAutomatonQuery}} (still in sandbox) is a simple way to get accurate
> query-time multi-token synonyms using the new {{SynonymGraphFilter}} from
> LUCENE-6664. It already has a utility class to directly translate an
> incoming {{TokenStream}} into a corresponding query.
> However the query is likely quite slow because it always iterates positions
> for all terms in the automaton.
> I think one simple approach is to walk the automaton and find the subset of
> terms (if any) that appear in common to all paths, and then approximate with
> {{ConjunctionDISI}} like {{PhraseQuery}} does. Such a subset doesn't always
> exist for an automaton (i.e. it could be empty), so the logic would have to
> be conditional...
> And I think there are more complex approximations we could make, but using
> {{ConjunctionDISI}} seems like a simple start.
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