[mlpack-git] [mlpack] Armadillo matrix transposition doubles memory usage for a matrix (#203)

[Glazachev Vladimir]

First memory usage picture is method number 2, and the second picture is method 0. method 1 have same memory usage as 0.

So, low memory implementation (method 2) is not so fast (should be O(NlogN) complexity, instead of O(N) in methods 0 and 1).


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