[MPlayer-users] Re: Strange option. -O4

[Jens Axboe]

On Wed, Dec 25 2002, Anssi Saari wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> On Wed, Dec 25, 2002 at 01:56:12PM +0100, Jens Axboe wrote:
> 
> > > if -O3 enables all possible opts, then -O4 probably enables impossible ones
> > > too :)
> > 
> > has any benchmarking been done whether that is truly a good idea or not?
> > levels above 2 does automatic loop unrolling 
> 
> Does it really? At least my understanding of the gcc manual isn't that. 
> It seems to me one would always need to enable loop unrolling with 
> -funroll-loops or -funroll-all-loops.

Sorry recollection, I meant -finline-functions. Same effect, though :)

Jens