Compiler speed (vanilla vs. LTO, PGO and LTO+PGO)

[Markus Trippelsdorf]

On 2013.03.25 at 06:07 -0700, Andi Kleen wrote:
> Markus Trippelsdorf <markus@trippelsdorf.de> writes:
> >
> > So it appears, contrary to the advice given above, that it is not useful
> > to build gcc 4.8.0 with the lto option at the moment.
> 
> Did you build firefox/kernel with debug info on/off?
> 
> Often debug info on changes the compiler performance significantly, as it
> generates a lot more IO.

Debug info was turned off in all cases (kernel, Firefox, gcc).

-- 
Markus