I inherited some a computation intensive ROOT GUI macro which runs as compiled code by using
#if defined(__CINT__) && !defined(__MAKECINT__)
Info("myMacro.C", "Has to be run in compiled mode ... doing this for you.");
This code works but I want to get rid of the GUI so I can run it in batch. I took out the GUI code and now compile it with g++. This version also works OK. However, I have found that the g++ version is 2x slower than the compiled macro version. This difference surprises me. I expected that the the g++ version would be slightly faster or the same. Is there anything in general which would make the g++ version slower?
Thanks for any suggestions.