Compiling Radiance with the Intel C Compiler now works!


I just added the data to the Benchmark page. He used "-O3 -xHost"



On Mon, 12 Sep 2011, Randolph M. Fritz wrote:

What level of optimization did you use with icc?


On 2011-09-11 14:01:29 -0700, Guy Vaessen said:

>> The performance of the Intel compiler is worse than the gcc compiler 4.5.2.
> Do you mean it takes longer to compile, or that Radiance runs more
> slowly compiled by icc?

Radiance runs more slowly compiled by icc.
The rpict time of gcc 4.5.2 is around 17 minutes 45 seconds and
the rpict time of icc V12 Update 6 is 20 minutes.

The binaries (elf files) produced by the Intel compiler are 1 MB which is twice the size of the binaries produced by gcc.

Another idea is to post a message on an Intel forum, informing them about gcc's better performance, they seem interested in this kind of information.
Maybe Intel can learn from gcc and improve their own compiler.



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