Robert Muir created LUCENE-6198:
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Summary: two phase intersection
Key: LUCENE-6198
URL: https://issues.apache.org/jira/browse/LUCENE-6198
Project: Lucene - Core
Issue Type: Improvement
Reporter: Robert Muir
Currently some scorers have to do a lot of per-document work to determine if a
document is a match. The simplest example is a phrase scorer, but there are
others (spans, sloppy phrase, geospatial, etc).
Imagine a conjunction with two MUST clauses, one that is a term that matches
all odd documents, another that is a phrase matching all even documents. Today
this conjunction will be very expensive, because the zig-zag intersection is
reading a ton of useless positions.
The same problem happens with filteredQuery and anything else that acts like a
conjunction.
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