# time make -j4 buildworld
2265.512u 405.500s 48:24.60 91.9% 3573+2045k 23853+2775io 1603pf+0w
# time make buildkernel
491.266u 65.434s 9:47.72 94.7% 3680+1754k 492+674io 4pf+0w
# time make KERNCONF=T40 buildkernel
488.346u 67.594s 9:53.20 93.7% 3677+1747k 479+683io 0pf+0w
とりあえず普通に動いてます。