Make the Highlighter use SpanScorer by default
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Key: LUCENE-1685
URL: https://issues.apache.org/jira/browse/LUCENE-1685
Project: Lucene - Java
Issue Type: Improvement
Reporter: Mark Miller
Assignee: Mark Miller
Priority: Minor
I've always thought this made sense, but frankly, it took me a year to get the
SpanScorer included with Lucene at all, so I was pretty much ready to move on
after I it got in, rather than push for it as a default.
I think it makes sense as the default in Solr as well, and I mentioned that
back when it was put in, but alas, its an option there as well.
The Highlighter package has no back compat req, but custom has been
conservative - one reason I havn't pushed for this change before. Might be best
to actually make the switch in 3? I could go either way - as is, I know a bunch
of people use it, but I'm betting its the large minority. It has never been
listed in a changes entry and its not in LIA 1, so you pretty much have to
stumble upon it, and figure out what its for.
I'll point out again that its just as fast as the standard scorer for any
clause of a query that is not position sensitive. Position sensitive query
clauses will obviously be somewhat slower to highlight, but that is because
they will be highlighted correctly rather than ignoring position.
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