------- Comment #13 from burnus at gcc dot gnu dot org 2007-06-28 12:03 ------- core2 AMD 0m45.215s 0m4.312s (no vectorize) 1m34.046s 0m4.668s -ftree-vectorize 0m45.447s 0m4.300s -ftree-vectorize -fvect-cost-model
i.e. "-ftree-vectorize -fvect-cost-model" is marginally faster than without -ftree-vectorize on AMD but slower on Intel; and on Intel "-ftree-vectorize" alone has a huge impact (80% slower) whereas on AMD only it is only 8% slower. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32084
