Sometimes, I don’t know why I do things. It’s one of these times. A few months ago, Python 3.13 got its JIT engine, built with a new JIT compiler construction methodology (copy-patch, cf. research paper). After reading the paper, I was sold and I just had to try it with PostgreSQL. And what a fun ride it’s been so far. This blog post will not cover everything, and I prefer other communication methods, but I would like to introduce pg-copyjit, the latest and shiniest way to destroy and segfault s...