Github user avulanov commented on the pull request:
https://github.com/apache/spark/pull/1290#issuecomment-52465553
@bgreeven I've looked at your code and the algorithm seems to be
implemented correctly to the best of my knowledge. Probably, copying of the
array of weights harms the performance. I played with single threaded
implementation of perceptron in Scala and it works fine for my size of data
(i.e. around few minutes).
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