Adrien Grand created LUCENE-8060:
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Summary: Require users to tell us whether they need total hit
counts
Key: LUCENE-8060
URL: https://issues.apache.org/jira/browse/LUCENE-8060
Project: Lucene - Core
Issue Type: Improvement
Reporter: Adrien Grand
Priority: Minor
Fix For: master (8.0)
We are getting optimizations when hit counts are not required (sorted indexes,
MAXSCORE, short-circuiting of phrase queries) but our users won't benefit from
them unless we disable exact hit counts by default or we require them to tell
us whether hit counts are required.
I think making hit counts approximate by default is going to be a bit trappy,
so I'm rather leaning towards requiring users to tell us explicitly whether
they need total hit counts. I can think of two ways to do that: either by
passing a boolean to the IndexSearcher constructor or by adding a boolean to
all methods that produce TopDocs instances. I like the latter better but I'm
open to discussion or other ideas?
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