Automatic, portable optimization of global access

[Raymond Hettinger]

[Raymond Hettinger]
> > FWIW, I've posted a brief, but powerful recipe for a bytecode
> > optimization that saves known globals as constants


[Paul]
> This looks important and will clean up a lot of code, but what happens
> if the function calls exec or eval, or assigns something into
> globals(), or whatever?

Quoth the recipe:

""" Binding should be applied selectively to those functions where
speed is important and dynamic updates are not desired (i.e. the
globals do not change). In more dynamic environments, a more
conservative approach is to set builtin_only to True so that only the
builtins get optimized (this includes functions like len(), exceptions
like IndexError, and constants like True or False).
"""


Raymond