[$] Modern Python performance considerations

There is a lot of work going on right now on speeding up Python; KevinModzelewski gave a presentation at PyCon 2022 on some of thatwork. Much of it has implications for Python programmers in terms of howto best take advantage of these optimizations in their code. He gave anoverview of some of the projects, the kinds of optimizations being workedon, and provided some benchmarks to give a general idea of how much fastervarious Python implementations are getting-and which operations are most affected.