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Sat Mar 7 00:48:03 CET 2015 · https://mail.python.org/pipermail/python-dev/2015-March/138642.html

On Fri, Mar 6, 2015, at 15:13, Chris Angelico wrote:
> On Sat, Mar 7, 2015 at 6:09 AM, Benjamin Peterson <benjamin at python.org>
> wrote:
> > I think it would be preferable deprecate -O and -OO and replace them
> > with flags like --no-docstrings or --no-asserts. Ideally, "optimization"
> > levels shouldn't change program semantics.
> 
> Plenty of C compilers have optimization levels that can change
> behaviour (replacing division with mult-by-reciprocal and such), so I
> don't see any reason for Python to object.

Yes, but in the C world, you have pass scary flags like -ffast-math.
Just -O2 generally won't reach outside of standard semantics.

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Showing content from https://mail.python.org/pipermail/python-dev/2015-March/138642.html below:

[Python-Dev] PEP 488: elimination of PYO files