Message 286726 - Python tracker

My motivation is improve speed, reduce memory usage, and quicker
startup time for real world applications.  If some optimization in
FAT optimizer has significant speedup, I want to try it.

But this time, my motivation is I felt "everyone think constant folding
should go to AST from peephole, there is a patch about it, but unfortunately
it was suspended (because of lack of reviewers, maybe)."

As reading #28813, I think there are consensus about constant folding
should go AST.