[csw-maintainers] Compiler optimization Sun Studio vs. GCC

[Peter FELECAN]

Dagobert Michelsen <dam at opencsw.org> writes:

> Hi Peter,
>
> I'm adding James to the post as he has experience in
> compiler optimization and used it for some of his packages
> extensively.
>
> Am 13.05.2009 um 15:04 schrieb Peter FELECAN:
>
>> Dagobert Michelsen <dam at opencsw.org> writes:
>>
>>>>> You have to install it :-) Apart from that the code generation for
>>>>> Sparc of gcc is very bad, that's why I also installed gccfss if
>>>>> the project absolutely demands gcc, but this further compilcates
>>>>> compilation.
>>>>
>>>> Having to install it is not an issue IMHO.
>>>>
>>>> When you say "very bad" what do you mean?
>>>
>>> The optimized is inferior to the one of SOS. I remember reading a
>>> comparison of the two, but I can't find it at
>>> <http://cooltools.sunsource.net/gcc/>
>>>
>>
>> Didn't find it either. Well, my question was motivated to really
>> qualify
>> the differences, lets say on a scale of 1 to 100, how do we position
>> the
>> 2 compilers for SPARC generated code. Saying "very bad" is relative
>> but
>> to what and in what measure?
>>
>> Finally, is that so important for the kind of packages that we
>> provide?
>> For 1%, 10% or 66%...
>
> Maybe James or some other maintainer has real, first-hand performance
> data?

Let James wisdom shine upon us!
-- 
Peter FELECAN
mailto:pfelecan at acm.org