## 3 Numba Tricks for Python Runtime Optimization When Numba code disappoints, it's nearly never the compiler, and usually ends up being the boundary around the compiled code: not crossing it, not making it wide enough, or crossing it during every run. Numba compiles a numeric Python loop to machine code without ever having to leave your Python environment, rewrite anything in C, or vectorize some chunk of code that does not want to be vectorized. When Numba code disappoints, it's nearly never the compiler. The offender usually ends up being the boundary around the compiled code: not crossing…