On Wed, Jun 17, 2009 at 8:46 PM, Jakub Jelinek<jakub@xxxxxxxxxx> wrote: > On Wed, Jun 17, 2009 at 02:41:54PM -0400, Bill Nottingham wrote: >> Gregory Maxwell (gmaxwell@xxxxxxxxx) said: >> > Consider: >> > >> > -Os on the x86 build? >> >> Back when I tested before, -Os unilaterally made things worse across >> Athlon64/C2D/Atom. > > Note that GCC 4.4 switches -Os on for unlikely executed basic blocks and/or > unlikely executed functions (of course profile feedback helps here a lot, > but even without it the heuristics gets it right in many cases), so forcing > -Os for all code, even hot, is not a good idea. > On the other side, compiling everything with -O3 is going to bloat code a > lot, just compile with -O3 the hot compilation units or even better just > hot functions. Is this (bloated code) really a problem if the code runs faster? -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
