[Tutor] Loop comparison

[ALAN GAULD]

> The precalculation optimisations are 
> taking place.  If you pass it an argument to use for the upper limit of the 
> sequence the calculation time shoots up.

I'm still confused about when the addition takes place. 
Surely the compiler has to do the addition, so it should be slower?
I assume you have to run the posted code through cython
prior to running it in Python?

You can probably tell that I've never used Cython! :-)

Alan G.