I installed 18.1 Mate on my friends Dell. It powers up to the desktop in 1m16s.
blame:
10.592s dev-sda1.device
7.488s ModemManager.service
5.796s loadcpufreq.service
5.078s accounts-daemon.service
3.981s systemd-logind.service
3.951s networking.service
3.723s ondemand.service
3.639s speech-dispatcher.service
3.382s systemd-udevd.service
3.326s console-kit-log-system-start.service
3.281s lm-sensors.service
3.260s pppd-dns.service
3.226s NetworkManager.service
3.195s rsyslog.service
2.144s thermald.service
2.102s lvm2-monitor.service
2.030s grub-common.service
1.833s console-setup.service
1.548s keyboard-setup.service
1.515s systemd-tmpfiles-setup-dev.service
1.461s binfmt-support.service
1.396s systemd-tmpfiles-setup.service
1.384s systemd-modules-load.service
1.355s systemd-journald.service
1.166s virtualbox-guest-utils.service
1.093s irqbalance.service
1.040s avahi-daemon.service
872ms upower.service
772ms sys-kernel-debug.mount
756ms polkitd.service
756ms dev-hugepages.mount
753ms dev-mqueue.mount
661ms hddtemp.service
585ms systemd-udev-trigger.service
539ms systemd-journal-flush.service
505ms plymouth-start.service
505ms plymouth-read-write.service
491ms kmod-static-nodes.service
474ms udisks2.service
403ms systemd-update-utmp.service
391ms systemd-sysctl.service
338ms systemd-random-seed.service
300ms dns-clean.service
280ms systemd-hostnamed.service
259ms proc-sys-fs-binfmt_misc.mount
255ms systemd-user-sessions.service
250ms ufw.service
237ms dev-disk-by\x2duuid-3d3bbf6c\x2dd139\x2d438a\x2db955\x2d34c1e4425d2e.swap
211ms setvtrgb.service
198ms plymouth-quit-wait.service
187ms plymouth-quit.service
174ms alsa-restore.service
151ms systemd-tmpfiles-clean.service
141ms systemd-remount-fs.service
128ms resolvconf.service
114ms
user@1000.service
92ms openvpn.service
82ms console-kit-daemon.service
71ms ureadahead-stop.service
66ms cpufrequtils.service
57ms ntp.service
48ms rc-local.service
46ms systemd-update-utmp-runlevel.service
31ms rtkit-daemon.service
19ms sys-fs-fuse-connections.mount
We bartered a bit and I came home with that Dell. Based on what I experienced with the Cinnamon installation over the past few days I will not try to reduce this startup time at all unless someone can come up with a fix that would take mere minutes to implement.
I envy those of you who are able to startup in less than 20s but I will be content with a little over 1m rather than the over 4m with which I started. The slow startup problem addressed here did not get solved but I thank everyone for trying.