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Re: gcc 3.5 integration branch proposal
> On Sun, Jan 18, 2004 at 10:49:30PM -0500, David Edelsohn wrote:
>
> > Did you build head configured with --disable-checking?
>
> Rebuilt with --disable-checking, and double-checked the options. There
> was a bug that meant I was not -O2 in both cases.
>
> Now, the actual options are
> -Wall -Wstrict-prototypes -Wmissing-prototypes
> -Wno-uninitialized -Wno-format -Wno-main -fno-builtin-printf
> -fno-builtin-log -fno-builtin-malloc -O2 -fno-strict-aliasing
> in both cases.
>
> And it's still a bit slower:
>
> gcc 3.3.2:
> 527.98s real 421.02s user 30.36s system
>
> gcc -head with --disable-checking:
> 544.91s real 439.52s user 30.27s system
>
>
> Okay, the slow-down is not as marked as with --enable-checking, but it
> still does exist: 4% is something.
You may consider using profiledbootstrap. It makes bootstrap slower,
but it pays back in compilation time later.
2 hours of whole build may already make it pay back. In fact I would be
extremly curious about that.
Honza