When it's a drop-in replacement, as in most of my code (and it's dead simple to try if it runs when you use pypy ./main.py), I wouldn't know why you should run

When it's a drop-in replacement, as in most of my code (and it's dead simple to try if it runs when you use pypy ./main.py), I wouldn't know why you should run the code 5-50% slower for no reason though