Efficient and performant programs

Its always exciting to me to perform at max efficiency, because why should you be performing any less? What's even better than efficiency than setting it and forgetting it? Nothing. Fact of the matter is while you may not be caring about efficiency, you should - because your business does. Lack of efficiency costs dollars and time.

max efficiency is spending 5 minutes making a python program instead of spending 5 hours to write the same exact thing in C
takes 5 more seconds to run, big deal
which is the actually inefficient language?
think about it