[issue14249] unicodeobject.c: aliasing warnings
STINNER Victor
report at bugs.python.org
Thu Apr 5 23:00:31 CEST 2012
STINNER Victor <victor.stinner at gmail.com> added the comment:
Ok, benchmarks have spoken, amen. I applied Serhiy Storchaka's patch (version 3). I just replaced expressions in calls to Py_MAX by variables: Py_MAX is a macro and it may have to compute each expression twice. I didn't check if it's more or less efficient. Thanks Serhiy for your contribution! I added your name to Misc/ACKS.
We may change Py_MIN/Py_MAX to something more efficient using typeof():
#define max(a,b) \
({ typeof (a) _a = (a); \
typeof (b) _b = (b); \
_a > _b ? _a : _b; })
I don't know which C compilers support it, but gcc does, at least.
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