[xppbowlf] Comparing gcc 4.4 4.5 4.6 4.7 profile guided optimization

g++ Version	Baseline speed	Profile-guided optimization
4.4	1.000	1.099
4.5	0.962	1.125
4.6	1.043	1.057
4.7	1.019	1.034

It is disturbing that performance has gotten worse in gcc 4.7.

gcc version 4.4.7 (Debian 4.4.7-1)
gcc version 4.5.3 (Debian 4.5.3-12)
gcc version 4.6.3 (Debian 4.6.3-1)
gcc version 4.7.0 (Debian 4.7.0-8)

g++-4.4 -Wall -O99 -march=native -DNDEBUG -pg -fprofile-generate point-growth.cpp
./a.out
g++-4.4 -Wall -O99 -march=native -DNDEBUG -fprofile-use -o profile point-growth.cpp
g++-4.4 -Wall -O99 -march=native -DNDEBUG -o baseline point-growth.cpp

/proc/cpuinfo

vendor_id    : GenuineIntel
cpu family    : 15
model        : 4
model name    : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping    : 1
microcode    : 0xd
cpu MHz        : 2793.177
cache size    : 1024 KB

Source code, scripts, etc.