Re: [julia-users] cflags

[Samuele Carcagno]

On 04/04/14 06:40, Elliot Saba wrote:

The ones that are the most important, (OpenBLAS, etc...) already use the
max safe levels.  Julia herself shouldn't matter that much, if you're
looking for speed.

Thank you for the info.

Sam

On Thu, Apr 3, 2014 at 1:58 AM, Samuele Carcagno <sam.carca...@gmail.com
<mailto:sam.carca...@gmail.com>> wrote:

    Hi,

    when compiling Julia from master, does specifying cflags help get
    better performance for Julia and dependencies, or these are already
    set at the maximum safe optimization levels (or it doesn't matter
    for other reasons)?

    For example for an Ivy Bridge Xeon I was thinking of setting the
    following:

         export CFLAGS="-march=corei7-avx -O2 -pipe"
         export CXXFLAGS="${CFLAGS}"

    btw I'm already setting `OPENBLAS_TARGET_ARCH=__SANDYBRIDGE` in
    `Make.user` to optimize openblas.

    Cheers,

    Sam