Github user debasish83 commented on the pull request:
https://github.com/apache/spark/pull/5005#issuecomment-81758180
@dlwh could you take a look into breeze.optimize.linear.NNLS code? I have
made sure no objects are allocated inside the solver loop and I re-use
everything from the previous state....It's strange that the runtime is slower
than mllib NNLS which uses jblas...
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