[$] Modern Python performance considerations

There is a lot of work going on right now on speeding up Python; Kevin
Modzelewski gave a presentation at
PyCon 2022 on some of that
work. Much of it has implications for Python programmers in terms of how
to best take advantage of these optimizations in their code. He gave an
overview of some of the projects, the kinds of optimizations being worked
on, and provided some benchmarks to give a general idea of how much faster
various Python implementations are getting—and which operations are most affected.