[cfe-dev] GCC 4.6, LLVM/Clang 2.9, DragonEgg Five-System Benchmarks

[Evan Cheng]

Himeno is built -O0, which makes zero sense as a performance benchmark. And you are right GraphicsMagick uses OpenMP, which means the comparison between Clang and the rest of the compilers are totally meaningless. 7-Zip builds just fine for me with Clang, I have no idea why they couldn't get it to build.

I think it's worthwhile to relay these information and hopefully they will correct these mistakes. But color me skeptical.

Evan

On Mar 30, 2011, at 5:28 AM, Tobias Grosser wrote:

> On 03/30/2011 05:25 AM, Frits van Bommel wrote:
>> On Wed, Mar 30, 2011 at 10:16 AM, Konstantin Tokarev<annulen at yandex.ru>  wrote:
>>> Can anyone explain significant superiority of DragonEgg over Clang is some tests?
>> 
>> IIRC someone on #llvm mentioned that clang's lack of OpenMP support is
>> likely the reason for some of the most significant differences, where
>> dragonegg is twice as fast as clang on a duo-core, four times as fast
>> on a quad-core, and so on.
> 
> Yes, that's what I also believe.
> 
> Here a link to the original test results:
> 
> http://openbenchmarking.org/result/1103264-IV-1103253IV95
> 
> And here some of the test descriptions:
> 
> GraphicsMagick: This is a test of GraphicsMagick with its >>OpenMP<< 
> implementation that performs various imaging tests to stress the 
> system's CPU.
> 
> Cheers
> Tobi
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