Github user avulanov commented on the pull request: https://github.com/apache/spark/pull/1290#issuecomment-67087128 @witgo @ankurdave Thank you for suggestion! I merged #3677 into the ANN code and then I run 100 iterations on mnist (60K instances). The running time improved only 1%. Is it expected to be so small or it should be bigger in different settings? Could you elaborate on how the mentioned PR might improve performance or this PR?
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