Re: gcc versus g++ optimization of identical C code
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Hi, On 07/23/2012 04:04 PM, Jules Colding wrote: > I've observed that my little side project: > > https://github.com/colding/disruptorC > > > consistently performs approximately 10% better when compiled with > g++ instead of gcc. Just adding "CC=g++" to configure.ac just after > AC_PROG_CXX is all it takes. > > Do I do something subtly wrong or is g++ merely much better at > generating code then gcc? That's a really interesting question. I'm not aware of anything very specific that would help g++ to generate much better code, but of course the two front ends do produce slightly different intermediate code for the back ends. I don't think there's any way to find out without some detailed study. Andrew.