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Re: Debug formats on Linux
- To: jfm2 at club-internet dot fr
- Subject: Re: Debug formats on Linux
- From: Richard Zidlicky <Richard dot Zidlicky at stud dot informatik dot uni-erlangen dot de>
- Date: Thu, 2 Nov 2000 20:19:04 +0100
- Cc: gcc at gcc dot gnu dot org
- References: <20001028001345.53A6DF42C@agnes.fremen.dune>
On Sat, Oct 28, 2000 at 02:13:45AM +0200, jfm2@club-internet.fr wrote:
> I benchmarked -fomit-frame-pointer with gcc 2.95 and speed bonus was
> well under 10%, and I think under 5%. I found this funny since I
> would expect an additional register woukld have a big impact on
> register-starved x86s. But unless omit-frame-pointer gives a far
> bigger impact I would not want to go through yet another massive
> change on Linux. I have had enough with libc4 -> libc5 -> glibc plus
> the uncompatible C++ libraries from
> gcc-2.7 -> egcs -> gcc-2.9[56]->gcc-3
fomit-frame-pointer gives better results to me, almost always around
10%, notably with programs that are hard to speed up otherwise. That
is for x86 and m68k, 2.7.2.3, 2.8.[01], 2.95.*.
Bye
Richard