Revision 140030 caused >10% 176.gcc performance regression in SPEC CPU 2000 on Intel Core 2 running Linux/x86-64 with -O2 -ffast-math.
Honza suggested that --- This mostl likely mean that your glibc has slow memset implementation. I saw similar drop on SPEC2000 GCC and Debian machines used by compilation farm. I was told that FSF glibc was finally updated with new GCC so hopefully this problem is solved now. Our (Opteron based) SPEC2006 tester seems fine http://gcc.opensuse.org/SPEC/CINT/sb-balakirew-head-64-2006/403_gcc_big.png --- I will verify it on Fedora 9.
I verified that on Fedora 9 there is no regression between revision 140029 and 140030 on Intel Core 2.
Works on Fedora 9.