[mlpack-git] [mlpack] mlpack KMeans class much slower than armadillo kmeans() (#514)

[jciminogh]

I have tried many starting points like random and same centroids for mlpack and arma. So far the armadillo kmeans() function is typically about 2x faster. With openmp enabled it is always many times faster.

For my purposes the default clustering method is good so far, but I will try your suggestion with mlpack's other clustering methods.


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