------- Comment #27 from eyal at geomage dot com 2008-02-11 14:00 ------- Hi, I am a bit lost and appriciate your guidelines. Up till now, after all those emails, I still have no clue as to why such a simple test case doesnt work. As far as I understood the vectorization should have shown between 2 to 4 times faster. With all the suggestions here I still didnt get more then 20-30% performance gain. I would appriciate if someone from the vectorization team could come up with detailed explaination as to how to make the vectorization do whats promised.
As for the last email, Victor: 1. Using a smaller number of iterations, doesnt help me. This is not what the real world code runs. 2. new/malloc almost didnt do anything maybe a gain of 20% 3. The difference between 1.738sec and 0.781sec can either be a 2 times performance gain or simply a 1 second gain that would remain 1 second for more intensive calculations. Therefore I cant use/rely on the test you did. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35117
