Github user hhbyyh commented on the pull request:
https://github.com/apache/spark/pull/1290#issuecomment-91181467
@debasish83 I'm interested in the Graphx-based NN and implemented a
prototype. Yet I found both feed forward and back propagation are slow
(unacceptably) due to `aggregateMessages` and `joinVertices`, which seems to be
inevitable, and will become worse if layer count increases.
Is there any other Graph based attempt available? or maybe some suggestion.
Thanks.
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