[oivey]

I’ve generally found they can be interchanged in the way you would expect as a Python user: duck typing. I have more experience using SubArrays, but I think the underlying machinery in the language is basically the same.

Adding performance after the fact is not easy. This is why most numerical Python projects depend on C extensions rather improvements to the Python runtime. Writing C extensions or jamming your algorithm into the shape of existing C accelerated APIs is often not very time efficient.