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From: ami_stuff <ami_stuff@o2.pl>
To: gcc@gcc.gnu.org
Subject: Speed regression (m68k)
Date: Sat, 13 Jun 2009 20:20:00 -0000	[thread overview]
Message-ID: <d02a52f.7316a242.4a3409ff.ce0b@o2.pl> (raw)

Hi,

I notice about 20% speed regression with GCC 4.4.0 PNGCrush build compared to GCC 3.4.0 build (Amiga 68060@50MHz). 

CFLAGS = -I. -DNO_FSEEKO -O2 -fomit-frame-pointer -Wall -m68060 -s

Here are the results:

GCC 3.4.0:

CPU time used = 267.340 seconds (decoding 16.940,
encoding 247.800, other 2.600 seconds)

GCC 4.4.0:

CPU time used = 328.360 seconds (decoding 16.800,
encoding 309.260, other 2.300 seconds) 

Maybe someone with m68k Debian/PPC/x86 can compile PNGCrush with GCC 3.4.0 and GCC 4.4.0, so we will know if this regression happens there too?

Regards


             reply	other threads:[~2009-06-13 20:20 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-13 20:20 ami_stuff [this message]
2009-06-15 19:19 ` Ian Lance Taylor
2009-06-15 23:46   ` ami_stuff

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