------- Comment #5 from dominiq at lps dot ens dot fr 2009-07-15 18:50 ------- > can anybody confirm?
On a 2.1Ghz core2duo, i686-apple-darwin, I get: [ibook-dhum] bug/timing% gfc -m64 -O3 -ffast-math pr40766_db.f90 [ibook-dhum] bug/timing% time a.out 4.36921651E+09 157.568u 0.454s 2:38.39 99.7% 0+0k 0+0io 27pf+0w [ibook-dhum] bug/timing% gfc -m64 -O3 -mfpmath=sse,387 -ffast-math pr40766_db.f90 [ibook-dhum] bug/timing% time a.out 6.78342144E+08 127.528u 0.411s 2:08.08 99.8% 0+0k 0+0io 0pf+0w [ibook-dhum] bug/timing% time a.out 4.3692155E+09 31.441u 0.288s 0:31.79 99.7% 0+0k 0+0io 1pf+0w So depending on the options, only a factor 4 to 5. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40766
