I followed your suggestions and built
babl-0.1.11/gegl-0.2.1/Gimp-2.8.0 using -Ofast -ffast-math
-ftree-vectorize. Using these flags, I reran the test at the top of
the thread. The c2g rendering on my machine is now 36 seconds as
compared to 6 minutes. I am impressed. :)
Now to test out gimp 2.9.1. That should be fun.
On Sun, Apr 29, 2012 at 6:54 AM, Øyvind Kolås <pip...@gimp.org> wrote:
> On Sun, Apr 29, 2012 at 10:44 AM, Jernej Simončič
> <jernej|s-gm...@eternallybored.org> wrote:
>> On Sun, 29 Apr 2012 03:31:26 +0200, Øyvind Kolås wrote:
>>> It also turns out that babl and GEGL on win32 seem to be compiled
>>> practically without optimization and without taking modern instruction
>>> sets into account, making any testing of them on windows
>>> unrepresentative of their actual performance.
>> What are the recommended optimization flags?
> On win32, no idea, perhaps look at what compiler flags are being used
> on linux? This is signal processing code and everything from
> -ffast-math to -ftree-vectorize and probably more are important.
> «The future is already here. It's just not very evenly distributed»
> -- William Gibson
> http://pippin.gimp.org/ http://ffii.org/
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