Also depends mostly on your size. The cost to rewrite your system to be twice as fast is about the same if you have 20k of hardware costs or 20M, but one saves

Also depends mostly on your size. The cost to rewrite your system to be twice as fast is about the same if you have 20k of hardware costs or 20M, but one saves 10k and the other 10M. Only one offsets the cost of the programmers