Github user jkbradley commented on the pull request:
https://github.com/apache/spark/pull/1379#issuecomment-66208868
@avulanov Nice tests! A few comments:
* Computing accuracy: It would be good to test on the original MNIST test
set, rather than a subset of the training set. The training set includes a
bunch of duplicates of images with slight modifications, so results on it might
be misleading.
* The timing tests look pretty convincing for ANN! Can you please confirm
whether both algorithms did all 40 iterations? Or did they sometimes stop
early b/c of the convergence tolerance?
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