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Re: C Compiler benchmark: gcc 4.6.3 vs. Intel v11 and others


On 1/18/2012 10:37 PM, Marc Glisse wrote:
On Wed, 18 Jan 2012, willus.com wrote:

For those who might be interested, I've recently benchmarked gcc 4.6.3 (and 3.4.2) vs. Intel v11 and Microsoft (in Windows 7) here:

http://willus.com/ccomp_benchmark2.shtml

http://en.wikipedia.org/wiki/Microsoft_Windows_SDK#64-bit_development


For the math functions, this is normally more a libc feature, so you might get very different results on different OS. Then again, by using -ffast-math, you allow the math functions to return any random value, so I can think of ways to make it even faster ;-)

I use -ffast-math all the time and have always gotten virtually identical results to when I turn it off. The speed difference is important for me.


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