[Python-Dev] pyc files, constant folding and borderline portability issues

Antoine Pitrou solipsis at pitrou.net
Mon Apr 6 16:43:11 CEST 2009

Cesare Di Mauro <cesare.dimauro <at> a-tono.com> writes:
> def f(): return ['a', ('b', 'c')] * (1 + 2 * 3)
> With proper constant folding code, both functions can be reduced
> to a single LOAD_CONST and a RETURN_VALUE (or, definitely, by
> a single instruction at all with an advanced peephole optimizer).

Lists are mutable, you can't optimize the creation of list literals by storing
them as singleton constants.



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