Github user avulanov commented on the pull request:
https://github.com/apache/spark/pull/1290#issuecomment-62199347
I think before doing this we need to consider the benefits versus the
current implementation with loops. I can name one - the readability of code
will be better with matrices. Could you suggest others? The scalability is not
an issue until all weight matrices (unrolled into vector for 'Gradient`) fit
into memory of one node.
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