On Wed, Jul 20, 2011 at 1:27 AM, Maurizio De Cecco <j...@dececco.name> wrote: > On clang/MacOSX i get an impressive improvement in performance, > around 4x on the operations, even just using the vector types for copying > data; my impression is that the compiler use some kind of vector > load/store instruction that properly use the available memory bandwidth, but > unfortunately i do not know more about the x86 architecture. > > On gcc/Linux, (gcc 4.5.2) the same code produce a *slow down* of around > 2.5x.
It's possible gcc generates code for lowest-common-denominator hardware by default, and you might need to give some compiler option to get it to use vector operations. See http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
