[Rcpp-devel] RcppArmadillo

[Chuck Anderson]

I translated some R code I have for training neural networks into C++ 
using Armadillo and call it using RcppArmadillo.   It was great fun to 
see how Armadillo allows a pretty direct translation from R to C++.  
However, I only see a speed up of 2 over the R execution time.  I 
expected much more. 

What speed up do others see?  Any suggestions for finding execution 
bottlenecks in my Armadillo code? 

Thanks,
  Chuck