The point is that Cython provides a nice intermediate stage between C and CPython. Most optimizations need the first factor of 100, not the last factor of 2. Y

The point is that Cython provides a nice intermediate stage between C and CPython. Most optimizations need the first factor of 100, not the last factor of 2. You can usually achieve that in Cython with an effort measured in characters changed rather than lines of code changed. I've played with Julia. It's nice enough, but it doesn't offer me anything I don't already get through the C/Cython/CPython hierarchy.