Hacker News Reader

He missed a critical option: you can write those loops in python and JIT them to C fast LLVM with numba: https://github.com/numba/numba

I tried numba. It isn't helping here.

Yes, I used @jit(nopython=True). It does not compile pandas code.

Try converting to a numpy array, executing the operations and converting back to pandas.

Also they recently added support for array expressions and allocation so you should upgrade if you haven't already.