On Sunday, 8 December 2013 at 13:02:56 UTC, ponce wrote:
On Sunday, 8 December 2013 at 13:00:26 UTC, Joseph Rushton
Wakeling wrote:
How is icc doing these days? I used it years ago (almost 10
years ago!) when it produced significantly faster executables
than gcc, but I had the impression that more recent gcc
releases either matched its performance or significantly
narrowed the gap.
I don't know. People say the gap has reduced a lot and you have
to use the #pragmas to get ahead.
My experience is that if you write loads of loops that *are*
vectorisable, but not trivially so, and then run on modern intel
hardware, intel will beat gcc. Otherwise, probably not. It's
become a rather narrow target.
