optimize spanfirstquery, spanpositionrangequery
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Key: LUCENE-2760
URL: https://issues.apache.org/jira/browse/LUCENE-2760
Project: Lucene - Java
Issue Type: Improvement
Reporter: Robert Muir
Fix For: 3.1, 4.0
SpanFirstQuery and SpanPositionRangeQuery (SpanFirst is just a special case of
this), are currently inefficient.
Take this worst case example: SpanFirstQuery("the").
Currently the code reads all the positions for the term "the".
But when enumerating spans, once we have passed the allowable range we should
move on to the next document (skipTo)
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