Compare blitz++, armadillo, boost::MultiArray

Question

I did a comparison between blitz++, armadillo, boost::MultiArray with the following code (borrowed from an old post)

#include 
using namespac         


        

Answer 1

My test showed boost arrays had the same performance as the native/hardcoded C++ code.

You need to compare them using compiler optimisations activated. That is: -O3 -DNDEBUG -DBOOST_UBLAS_NDEBUG -DBOOST_DISABLE_ASSERTS -DARMA_NO_DEBUG ... When I tested (em++), Boost performed at least 10X faster when you deactivate its asserts, enable level 3 optimisation using -O3, etc. Any fair comparison should use these flags.