Re: GCC 4..4.x speed regression - help?

2009-08-17 Thread Kenneth Hoste
On Aug 16, 2009, at 18:02 , Martin Guy wrote: Yes, GCC is bigger and slower and for several architectures generates bigger, slower code with every release, though saying so won't make you very popular on this list! :) One theory is that there are now so many different optimization passes

Re: GCC 4..4.x speed regression - help?

2009-08-17 Thread Paolo Bonzini
On 08/16/2009 06:02 PM, Martin Guy wrote: Yes, GCC is bigger and slower and for several architectures generates bigger, slower code with every release, though saying so won't make you very popular on this list! :) But surprise, if you report a bug, chances are it will be fixed (especially for

Re: GCC 4..4.x speed regression - help?

2009-08-17 Thread Richard Guenther
On Mon, Aug 17, 2009 at 9:19 AM, Kenneth Hostekenneth.ho...@ugent.be wrote: On Aug 16, 2009, at 18:02 , Martin Guy wrote: Yes, GCC is bigger and slower and for several architectures generates bigger, slower code with every release, though saying so won't make you very popular on this list!

GCC 4..4.x speed regression - help?

2009-08-16 Thread ami_stuff
Hi, I found out that GCC 4.4.x build of minigzip from zlib package is a lot slower compared to GCC 3.4.0 build. Maybe someone can compile minigzip for his system with GCC 3.4.x and GCC 4.4.x and compare time of compression with bigger file? This way we would know if this regression only happens

Re: GCC 4..4.x speed regression - help?

2009-08-16 Thread Bernd Roesch
please correct the Bugreport 40454 with the values of gcc 4.1.2 4.2.5. it seem 4.1.2 reach near same speed as 3.4.0 but all later gcc are slower in some programs. this can also see on ffmpeg. also on X86 ffmpeg see here it is see. what is change after 4.1.2 that can cause slower executable

Re: GCC 4..4.x speed regression - help?

2009-08-16 Thread ami_stuff
Hi, The problematic source code is deflate.c from libz. CFLAGS=-O3 -DUSE_MMAP -m68060 -fomit-frame-pointer When I compile all source code with GCC 4.4.1, I get slow minigzip binary. When I compile all source code with GCC 4.4.1 except deflate.c (this one I compile with GCC 3.4.0), I get

Re: GCC 4..4.x speed regression - help?

2009-08-16 Thread Martin Guy
Yes, GCC is bigger and slower and for several architectures generates bigger, slower code with every release, though saying so won't make you very popular on this list! :) One theory is that there are now so many different optimization passes (and, worse, clever case-specific hacks hidden in the