rm -rf temp/*
/usr/bin/time make builddoc
sleep 5
rm -rf temp/*
make realclean
/usr/bin/time make -j 5 build
sleep 5
rm -rf temp/*
make realclean
/usr/bin/time make -j 10 build
sleep 5
rm -rf temp/*
make realclean
/usr/bin/time make -j 20 build
sleep 5
rm -rf temp/*
make realclean
/usr/bin/time make -j 40 build
