Inside Python 3.15's JIT Optimizer

Python 3.15's JIT is finally starting to see real speedups on benchmarks. Core to that is a revamped JIT optimizer. What the JIT selects to compile and how it optimizes code has seen significant improvements thanks to the work of many contributors. In this talk, I will cover in-depth how the Python JIT optimizes your Python code, and how this was an amazing community team effort spanning multiple continents.