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Alexey Diomin commented on FLINK-4148: -------------------------------------- yes, I will make PR > incorrect calculation distance in QuadTree > ------------------------------------------ > > Key: FLINK-4148 > URL: https://issues.apache.org/jira/browse/FLINK-4148 > Project: Flink > Issue Type: Bug > Reporter: Alexey Diomin > Priority: Trivial > Attachments: > 0001-FLINK-4148-incorrect-calculation-minDist-distance-in.patch > > > https://github.com/apache/flink/blob/master/flink-libraries/flink-ml/src/main/scala/org/apache/flink/ml/nn/QuadTree.scala#L105 > Because EuclideanDistanceMetric extends SquaredEuclideanDistanceMetric we > always move in first case and never reach case for math.sqrt(minDist) > correct match first EuclideanDistanceMetric and after it > SquaredEuclideanDistanceMetric > p.s. because EuclideanDistanceMetric more compute expensive and stay as > default DistanceMetric it's can cause some performance degradation for KNN on > default parameters -- This message was sent by Atlassian JIRA (v6.3.4#6332)