------- Comment #9 from burnus at gcc dot gnu dot org 2010-09-08 21:00 ------- For what it is worth, on AMD Athlon 64 X2 4800+ / x86-64-linux, I get for gfortran -O3 -ffast-math -march=native -- and with with and without -flto: 0m45.132s -- (options as above) 0m52.731s -- additionally -fwhole-program
That's a +16% increase in run-time with -fwhole-program. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44334
