> I work for the company that produces Numba, but I do not work on Numba

In experience Cython and C++ extensions are still the best way to speed up existing Python algorithms. Initially Numba showed great promise but after attempting to jit compile several simple hotspots ( cryptography and hashing functions primarily ) in my application I discovered lot of bugs and apparent numeric instability particularly in the trigonometric and bit functions. Have these issues been resolved? For instance for Diffie–Hellman calculations?