[Xapian-tickets] [Xapian] #215: Boolean OR could be optimised further
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nobody at xapian.org
Thu Apr 24 09:19:21 BST 2008
#215: Boolean OR could be optimised further
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Reporter: richard | Owner: olly
Type: enhancement | Status: new
Priority: normal | Milestone:
Component: Matcher | Version: SVN HEAD
Severity: minor | Resolution:
Keywords: | Blockedby:
Platform: All | Blocking:
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Comment(by richard):
PostingSource has a get_maxweight() method - if this returns 0, or if the
PostingSource is under a "OP_MULT_WEIGHT 0" (or the boolean part of an
OP_FILTER), we can ignore the weights returned by it. I don't see why it
would be any harder to do this with weights from an external source,
therefore.
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Ticket URL: <http://trac.xapian.org/ticket/215#comment:5>
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