"Giovanni Bajo" <[EMAIL PROTECTED]> writes: > Peter Dembinski wrote: > >>> BTW, a typical performance optimization (not done automatically by >>> python) is to hoist unchanging-value expressions out of loops, and >>> obj.method is often such an expression, so you will this strategy >>> when people try >>> to squeeze extra performance from their programs. >> >> Good to know. Is there any advanced optimizer for Python code, >> which would do such things for me (or suggest them, like pychecker >> does for readability)? > > > Prove that a.f() would not change the meaning of "a.f" after its > invokation is close to impossible.
Many things in Python programs cannot be proved. But what about suggesting optimisations, not doing them automatically? The similar case may be found in refactorization -- most things cannot be proved, so the final decision is left to the programmer (and his unit tests). -- http://www.peter.dembinski.prv.pl -- http://mail.python.org/mailman/listinfo/python-list
