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[Bug c/40454] GCC 4.4.0 vs 3.4.0 - PNGCrush is about 20% slower when compiled with GCC 4.4.0
- From: "ami_stuff at o2 dot pl" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Aug 2009 14:02:53 -0000
- Subject: [Bug c/40454] GCC 4.4.0 vs 3.4.0 - PNGCrush is about 20% slower when compiled with GCC 4.4.0
- References: <bug-40454-17839@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from ami_stuff at o2 dot pl 2009-08-16 14:02 -------
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 minigzip binary with normal speed.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40454