Re: Xcode-users Digest, Vol 2, Issue 272
Re: Xcode-users Digest, Vol 2, Issue 272
- Subject: Re: Xcode-users Digest, Vol 2, Issue 272
- From: "Roni Music" <email@hidden>
- Date: Tue, 14 Jun 2005 21:23:13 +0200
> Message: 10
> Date: Tue, 14 Jun 2005 09:16:26 -0700
> From: Jim Ingham <email@hidden>
> Subject: Re: Moving from CodeWarrior to XCode
> To: Stefan Werner <email@hidden>
> Cc: email@hidden
> Message-ID: <email@hidden>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> There has been a lot of work on improving code quality in gcc, but
> most of it recently has gone into gcc 4.0, not gcc 3.3. If people
> find cases where the code quality is worse in gcc than in
> CodeWarrior, please file bugs with the compiler folks. They want to
> know about this sort of thing. But don't file bugs against the 3.3
> compiler, that is really on maintenance. Check to make sure the
> problem still exists in gcc 4.0 before filing a bug.
Actually after following this advice:
>Try -Os (optimize for Size) for most code. Use -O3 for only the most
>performance critical code.
then my new XCode project produces faster code than my old CodeWarrior project .
And this is with gcc 3.3
So this is great!
Rolf Nilsson
>
> Jim
>
> On Jun 14, 2005, at 2:56 AM, Stefan Werner wrote:
>
> > Hi,
> >
> > On Jun 13, 2005, at 7:58 PM, email@hidden
> > wrote:
> >
> >> Does CodeWarrior generate that much better/faster code
> >> or are there settings in XCode I have missed?
> >>
> >
> > In one project I converted, it turned out that for some reason
> > XCode set a flag to disable inlining which cost a lot of
> > performance. Yet, my overall impression is still that the code that
> > CodeWarrior 8 generates runs faster and is "cleaner" (=less
> > pipeline stalls in Shark) than the same code compiled in gcc3/
> > XCode1.5.
> >
> > Stefan
> > --
> > Stefan Werner, Media Computing Group
> > Department of Computer Science 10, RWTH Aachen University
> > Ahornstrasse 55, 52074 Aachen, Room 2U11
> > Phone: +49 (241) 80-21055 Fax: +49 (241) 80-22050
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