The main problem is that generic parallelism is hard, and doesn't give you a straight X multiple speed up[1]. 1. https://en.wikipedia.org/wiki/Parallel_computi

The main problem is that generic parallelism is hard, and doesn't give you a straight X multiple speed up[1]. 1. https://en.wikipedia.org/wiki/Parallel_computing#Amdahl.27s_law_and_Gustafson.27s_law https://en.wikipedia.org/wiki/Parallel_computing#Amdahl.27s_...