Why Python Is 100x Slower Than C

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 answer isn't a missing compiler — Python has one. The answer is what happens on every single iteration. What a + b Actually Costs In C, a + b compiles t