Are you forgetting about PyPy, which has existed for almost 2 decades at this point?

That's a completely separate codebase that purposefully breaks backwards compatibility in specific areas to achieve their goals. That's not the same as having a first-class JIT in CPython, the actual Python implementation that ~everyone uses.

	▲	brokencode 14 hours ago \| parent [-]
		Definitely agree that it’s better to have JIT in the mainline Python, but it’s not like there weren’t options if you needed higher performance before. Including simply implementing the slow parts in C, such as the high performance machine learning ecosystem that exists in Python.