Re: Execution speed...
Python makes those things easy, that's why it is a game changer for science.
When talking about science, it is best to avoid hyperbole and exaggeration. Is python a sometimes convenient tool? Yes. Is it helpful to have iin some situations? Absolutely. Is it a "game changer"? Hell, no.
New algorithms for data processing and representation, or new models to analyse that data, or new theories to explain it, or new experimental techniques to measure it can be a critical new development, or a "game changer" if you will. A computer language which allows you to quickly slap together a bit of code neither your colleagues nor yourself will understand in two months time? Not so much.