Michael McCandless created LUCENE-4598:
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Summary: Facet aggregation should work per segment
Key: LUCENE-4598
URL: https://issues.apache.org/jira/browse/LUCENE-4598
Project: Lucene - Core
Issue Type: Improvement
Reporter: Michael McCandless
Currently the facet module uses MultiFields.* to pull the D&PEnum in
PayloadIterator, to access the payloads that store the facet ords.
It then makes heavy use of .advance and .getPayload to visit all docIDs in the
result set.
I think we should get some speedup if we go segment by segment instead ...
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