Optimization

[mmulvahill]

1. Avoid virtual function call lag with static polymorphism. Likely needed approach would be template classes and curiously recursive template pattern (CRTP).
   • https://www.fluentcpp.com/2017/05/16/what-the-crtp-brings-to-code/
   • https://www.fluentcpp.com/2017/04/28/extract-interface-cpp/
   • https://stackoverflow.com/questions/262254/crtp-to-avoid-dynamic-polymorphism/262984#262984
   • https://www.cs.indiana.edu/pub/techreports/TR542.pdf
2. Armadillo for faster matrix operations
   • http://arma.sourceforge.net/docs.html