ld flag that gives ~40% startup time boost

[James Laver]

Yes, yet when I saw that, I was thinking `that's an odd warning
level`. A check of the docs for gcc later and I still can't find any
note of it. Would you like to explain a touch more about how it
affects things?

Thanks

On 22/06/06, John Richard Moser <nigelenki at comcast.net> wrote:
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> James Laver wrote:
> > With gentoo it's largely in the users' hands. They can build the base
> > tarball with whatever switches they like, but by the time it comes
> > round to updates of the system, a lot of core things will be updated
> > and compiled with your global make.conf options.
> >
> > On a sidenote, I'm rather fond of -O3 where it works (sqlite, for
> > example), but i typically go -O2 for most of my compiles.
> >
>
> - -O3 and -O2 do nothing with -Wl,-O; it's a binary switch.
>
> > Obviously start up speed is a big factor, it's what everyone whines
> > about, and I mean everyone.
>
> I'm currently looking into other things like --relax (which... does
> what?  The man page is very vague) and anything else I can come across
> that's harmless.  It's hard to know exactly what the environment on the
> build server looks like though, since ubuntu doesn't seem to have this
> documented anywhere I can easily locate... (one of the devs told me he
> "thinks" -Wl,-O1 is in the ENV on the build server)
>
> >
> > On 22/06/06, Scott James Remnant <scott at ubuntu.com> wrote:
> >> On Thu, 2006-06-22 at 15:51 -0400, John Richard Moser wrote:
> >>
> >> > Does Ubuntu build everything with -Wl,-O1?  This was something that
> >> > Gentoo did as an optimization;
> >> >
> >> Yes, we do; Gentoo started doing it because we did.
> >>
> >> Scott
> >> --
> >> Scott James Remnant
> >> scott at ubuntu.com
> >>
> >>
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> >>
> >>
> >>
> >
> >
>
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--James Laver
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