gcc-4.5-RH in F14

[Al Dunsmuir]

Hello Chen,

Thursday, July 8, 2010, 12:05:43 PM, Chen Lei wrote:

> 2010/7/8 Jakub Jelinek <jakub at redhat.com>:
>> Generally, much better speedup can be achieved by using PGO
>> (-fprofile-generate, run on some testsuite, -fprofile-use).
>> GCC itself is built that way for several years, but it would be useful if
>> other performance sensitive packages were built that way too, assuming they
>> have some testsuite which resembles common use.
>>
>> E.g. bash can be easily trained on some configure or some other
>> large shell scripts, similarly for python, perl, ...
>> The speedups from this can go up to say 30% or so.
>>
>>        Jakub
>> --
> It seems MeeGo builds core packages by using PGO already. Is there
> anyone who would like to volunteer to write a packaging guideline
> about using PGO?
> Regards,
> Chen Lei

FireFox  and  Thunderbird  are already set up with their own PGO build
support.   One  of the complaints for the last year has been that this
is  used  for  Windows  build, but not for the Linux platform.  Sounds
like F14 would eliminate that particular wart.  See:
https://developer.mozilla.org/en/building_with_profile-guided_optimization

Hope this helps,
Al