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From xumSun <>
Subject ScoreCachingLeafCollector
Date Fri, 18 Jan 2019 08:24:47 GMT
    i am using groupingSearch, and the lucene vsrsion is 7.2.1,i found that
ScoreCachingLeafCollector will compute the document score,and also in the
FirstPassGroupingCollector the RelevanceComparator compute the score
again,because i use the CustomScoreQuery and the customScore method is
complicated,so the grouping is slow,why not wrap the scorer in 
ScoreCachingLeafCollector to ScoreCachingWrappingScorer?

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