"But It’s not just about running fast, battery life matters as-well. Fewer cycles means less battery consumption which is a major win if you ask me. As long as I can help it, I’ll do my best to avoid draining a user’s battery in five minutes."

I was thinking about languages in terms of ecology. I'm a Python fan and while its lack of performance never bit me in the real world, how many Joules would be saved if my apps were written in another language ? I'd love to see a study/comparison based on real apps (not algos implementations).