https://www.youtube.com/watch?v=JXrPfI08euE

Two programs. The same loop — sum every integer from 0 to 100 million. One in Python, one in C. Same algorithm, same answer.

C finishes in 0.82 seconds. Python takes 92 seconds. That's 112× slower.

Everyone who's ever written Python knows it's "slow." Very few know why. The answer isn't the GIL. The...