Of course, Python will always be slower than C/C++. But you’ll only notice it’s made with python if it is slow, otherwise you won’t even think about it. Many system utils use it, for the convenience of ArgumentParser etc., but as they follow the principle of doing one thing only, but very quickly and well, you’ll not even notice the difference between it being written in python, running for 0.1s, and C, running for 0.01s.