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Question:
I use icc (big deal) but lately I'm very skeptical about performance on non-intel cpus. cpu dispatcher, Is it fair for the user?
Asked by gio (62.103.65.x) on December 23 2011, 3:32pm
Reply on December 23 2011, 9:49pm:
I haven't done exhaustive tests, but I believe the following to be the case:
ICC produces code that is a lot faster on Intel CPUs, when compared to both VC6 and VC2005, though the gains are a bit less when VC2005 has SSE2 enabled (but that of course requires a non-ancient CPU).
ICC produces code that is a lot faster on AMD CPUs, when compared to VC6 or VC2005 (when the latter has SSE2 disabled).
ICC vs VC2005/SSE2 on AMD CPUs, that I'm not so sure about.
My experiences are based on ICC 10.x, I should mention, which is old.
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