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gentoo ~ # eselect profile list ... [27] default/linux/amd64/17.1/no-multilib/hardened (stable ... gentoo ~ # eselect profile set 27 gentoo ~ # source /etc/profile gentoo ~ # time emerge --oneshot gcc real 83m7.695s user 127m57.571s sys 13m31.611s gentoo ~ # time emerge --oneshot binutils virtual/libc real 8m0.371s user 10m8.256s sys 1m33.139s gentoo ~ # time emerge --emptytree --verbose @world real 39m26.852s user 41m13.918s sys 12m43.084s