Github user yangliuyu commented on the pull request:
https://github.com/apache/spark/pull/964#issuecomment-47886598
@mengxr k is 100, rCond, tol and maxIterations are all defaults, i.e. 1e-9,
1e-10, 300. Change iteration number from 300 to 200 will not reduce too much
time cost <10% (test on another small size of dataset 61794 x 100, k=99 ~110s)
btw, "improve RowMatrix multiply" patch works well.
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