[kzrdude]

In Python you'd maybe think, smart, then my counter is a fast local variable. But you look up (slow) the builtin hasattr and the module global f anyway to get at it. :)

I looked at python dis output before writing this, you can look at how it specializes in 3.11. But there's also 4 occurences of LOAD_GLOBAL f in the disassembly of this function, all four self-references to f go through module globals, which shows the kind of "slow" indirections Python code struggles with (and can still be optimized, maybe?)

You could scratch your head and wonder why even inside itself, why is the reference to the function itself going through globals? In the case of a decorated or otherwise monkeypatched function, it has to still refer to the same name.