We would like to take a moment to talk about the experimental just-in-time compiler in CPython, and the path we think it should take from here. Over the past several years, several core developers and contributors have been building a JIT compiler in the main branch of CPython. We want to begin by thanking them. This has been hard, deeply technical work that has been done with great care, and the recent performance improvements are real and encouraging. None of what follows is a criticism of th...