I was curious to know how modern C++ would compare. Here is a version (not 100% sure about the result because I was not 100% sure of the meaning of some of the

I was curious to know how modern C++ would compare. Here is a version (not 100% sure about the result because I was not 100% sure of the meaning of some of the numpy constructs when applied to matrixes). http://chronos.isir.upmc.fr/~mouret/tmp/nn_eigen3.cc http://chronos.isir.upmc.fr/~mouret/tmp/nn_eigen3.cc It seems pretty fast!