On an athlon 2500+ with 1.5gb of RAM.

# ../gcc-4.1-20050424/configure --disable-checking  ; time make bootstrap

real    72m54.926s
user    62m3.132s
sys     9m23.598s

opreport -l -f > /tmp/GCC-all
opreport -l > /tmp/GCC-all2
opreport -l image:/tmp/gccbuild/gcc/cc1 > /tmp/GCC-cc1 
opreport -l image:/tmp/gccbuild/gcc/jc1 > /tmp/GCC-jc1 
opreport -f > /tmp/GCC-overall 
opreport -f -x > /tmp/GCC-overall2