I wrote:
On our weather forecasting code (compiled with -O3 -flto and linked with
-O3 -flto -fwhole-program) I get a speedup of 65 seconds per time step
in the model integration vs. 75 seconds with -O3 alone.
That is a 10/75 ~ 13 % improvement.
This morning I tried again, with a freshly updated trunk (so the correct
behavior of -fwhole-program), and I got an additional 3 seconds (from 65
to 62 seconds per time step), which is ~ 5 %.
--
Toon Moene - e-mail: t...@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
At home: http://moene.org/~toon/
Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html
