Kent Johnson wrote: > Shane Hathaway wrote: >>I'm talking about using imports *everywhere*. The penalty would be >>appreciable. > > > Have you tried it? > > D:\Projects\CB>python -m timeit -s "import re" "import re" > 1000000 loops, best of 3: 1.36 usec per loop > > You need a lot of imports before 1 usec becomes "appreciable".
Let me fully elaborate the heresy I'm suggesting: I am talking about inline imports on every other line of code. The obvious implementation would drop performance by a double digit percentage. > And your > proposal is doing the import anyway, just under the hood. How will you > avoid the same penalty? The more complex implementation, which I suggested in the first message, is to maintain a per-module dictionary of imported objects (distinct from the global namespace.) This would make inline imports have almost exactly the same runtime cost as a global namespace lookup. But never mind, this proposal is a distraction from the real issue. See the next thread I'm starting. Shane -- http://mail.python.org/mailman/listinfo/python-list
