BTW, this optimization also makes some old optimization tricks obsolete.
1. No need to write 'def func(len=len)'. Globals lookups will be fast.
2. No need to save bound methods:
obj = []
obj_append = obj.append
for _ in range(10**6):
obj_append(something)
This hand-optimized code would only be marginally faster, because of
LOAD_METHOD and how it's cached.
Yury
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