I have a DisjunctionScorer based on a PriorityQueue lying around,
but I can't benchmark it myself at the moment. In case there is
interest, I'll gladly adapt it to org.apache.lucene.search and add it in bugzilla.
This should look a lot like SpanOrQuery.getSpans().
On a related note, I implemented ConjunctionScorer using Java's collection classes rather than a Lucene priority queue, just to see if I could. It turns out to have to allocate memory in sortScorers() which makes it slower than it could be, but I have not yet gotten around to fixing it. I'd like to re-write this to look like PhraseScorer and NearSpans, which operate without allocation.
Doug
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