Re: Bug#102193: gcc-3.0: compiled code with gcc 3.0 is slow and big :-(
On Mon, 25 Jun 2001, Matthias Klose wrote:
> funny report. what do you expect? please provide the relevant source
> as documented in /usr/share/doc/gcc-3.0/README.Bugs.gz.
>
> > I'm Gabor Lenart from Hungary and we're developing a movie player software
> > for Linux. We tried to compile and benchmark mplayer (our player) with both
> > of gcc 3.0 and gcc 2.95. We found out that gcc 3.0 produces SLOWER and BIGGER
> > code than 2.95. Is it normal? If it is, I will refuse to use gcc 3.0 since
> > I need maximum speed, since on my AMD K6-2 DVD playback is a very CPU
> > sensitive situation.
FYI, the K6 support in gcc suffered a tad from bitrot, so it's not
nearly as good as it could be (which could explain poor performance
if you're compiling your code with the K6 scheduling/optimisation
options). Work is being done on it now, though, to improve things
hopefully for 3.0.1. Athlon support is pretty good, though, if that's any
consolation.
Other than that, I agree with Matthias...we would need the code to really
determine if that's the true cause or not.
C
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