Mark Miller wrote: > Grant Ingersoll wrote: > >> At a minimum, I think we might be able to refactor the callback mechanism >> for it just as we did for the collectors, such that we push of the actual >> calculation of the sum of squares into Similarity, instead of just doing >> 1/sqrt(sumSqs). That way, when people want to override queryNorm() to >> return 1, they are saving more than just the 1/sqrt calculation. By the way - this issue does just that http://issues.apache.org/jira/browse/LUCENE-1907. I don't think its really any measurable perf savings, but it certainly makes more sense.
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