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Re: Comparison of GCC-4.9 and LLVM-3.4 performance on SPECInt2000 for x86-64 and ARM


> On 15 July 2014 15:43, Jan Hubicka <hubicka@ucw.cz> wrote:
> > I also noticed that GCC code size is bigger for both firefox and libreoffice.
> > There was some extra bloat in 4.9 compared to 4.8.
> > Martin did some tests with -O2 and various flags, perhaps we could trottle
> > some of -O2 optimizations.
> 
> Now that you mention, I do believe that was with 4.9 in comparison
> with both 4.8 and LLVM 3.4, all on -O3, around Feb.
> 
> Unfortunately, I can't share with you the results, but since both
> firefox and libreoffice show the same behaviour, I guess you already
> have a way through.

Well, not really - those are really huge codebases and thus hard to analyze,
so I did not have time to nail it down to something useful yet.

Honza
> 
> cheers,
> --renato


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