Agree. It's a bit surprising to see that numpy indexed operations are even slower than the built-in list in this example. It seems the idiomatic numpy way to pe

Agree. It's a bit surprising to see that numpy indexed operations are even slower than the built-in list in this example. It seems the idiomatic numpy way to perform the iterations is through vectorization, but that often leads to code that is not straightforward to reason about. For this example, I'd prefer the simplicity of the Cython for-loop when it comes to optimization.