Mail Archives: pgcc/1998/11/22/15:55:45
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Hmmmm. If any of the developers are on the list, I would be
interested
in the answer to this as well, as I have a P2, and I tend to compile
- -O6 -mpentiumpro by default on all my apps that are C++ source code.
Mind you, this is for c++ source code. There is no -O6 for c source
that I'm aware of. My impression was that the max was -O3 for c
source.
Would having -O6 to compile c source have the effect of turning off
optimization since there isn't an -O6 level? Could this be Michael's
problem?
Michael Kunze wrote:
>
> Hi all,
>
> i'm encountering a very funny problem with an optimized gzip 1.2.4.
When
> i zgrep through a series of gz-files, my optimized gzip
(-mpentiumpro
> -march=pentiumpro -O6) is 20 secs SLOWER (-25%) than my stock SuSE
gzip.
> I have indeed isolated the problem being gzip, not grep. I compiled
the
> new gzip from SuSE's source rpm, just modifying the CFLAGS-line as
> stated above. On my machine, i use the pgcc 1.1 precompiled compiler
> binaries, not the whole egcs stuff.
>
> Has anybody seen a similar effect. What could cause it? Please
respond
> directly to my email address, as i'm not on the list.
>
> Greetings
> Michael
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