-j1: real 7m53.195s user 7m23.475s sys 0m28.979s -j4: real 2m21.122s user 8m21.439s sys 0m35.498s -j7: real 1m58.140s user 11m50.001s sys 0m49.386s -j8: real 1m53.850s user 12m49.398s sys 0m52.690s real 1m53.596s user 12m48.977s sys 0m52.809s -j9: real 1m54.790s user 12m55.178s sys 0m53.749s -j12: real 1m55.133s user 12m59.961s sys 0m54.652s