Ce qui m´a saoulé récemment sous gentoo, c´est que xorg 7.1 n´a pas été masqué et que ça a tout casser avec le pilote nvidia. J´ai dû downgrader à xorg 7.
Sinon chez moi avec un amd64 3000+ :
Tue May 30 05:23:00 2006 >>> www-client/mozilla-firefox-1.5.0.3
merge time: 28 minutes and 41 seconds.
Wed May 31 11:55:11 2006 >>> app-cdr/k3b-0.12.15
merge time: 13 minutes and 26 seconds.
Tue May 30 20:34:39 2006 >>> app-office/koffice-1.5.1-r1
merge time: 2 hours, 34 minutes and 44 seconds.
Sat Feb 18 00:18:58 2006 >>> media-sound/amarok-1.3.8
merge time: 7 minutes and 58 seconds.
Wed May 31 11:28:24 2006 >>> media-gfx/blender-2.41
merge time: 12 minutes and 52 seconds.
Wed May 31 04:06:07 2006 >>> media-video/xine-ui-0.99.4-r5
merge time: 2 minutes and 22 seconds.
Fri Feb 17 00:51:50 2006 >>> media-video/mplayer-1.0_pre7-r1
merge time: 5 minutes and 51 seconds.
Tue May 30 07:01:29 2006 >>> net-im/psi-0.10
merge time: 8 minutes and 36 seconds.
Wed May 31 15:25:37 2006 >>> x11-libs/qt-4.1.3
merge time: 1 hour, 22 minutes and 14 seconds.
Wed May 31 02:18:24 2006 >>> kde-base/kdenetwork-3.5.2
merge time: 32 minutes and 40 seconds.
Mon May 29 15:24:40 2006 >>> sys-libs/glibc-2.4-r3
merge time: 57 minutes and 15 seconds.
Voilà, pour te donner une idée. 