Long compilation time for IProduct.cpp and IProductWRTDerivBase.cpp
This issue relates to a problem that we found when trying to compile Nektar++ on Marenostrum supercomputer due to time limit.
On Marenostrum, execution time is limited to 10 minutes in the interactive nodes and it happened that the master
took more than 10 min on the compilation of /library/MatrixFreeOps/IProduct.cpp and /library/MatrixFreeOps/IProductWRTDerivBase.cpp. So the code couldn't be compiled interactively on that machine.