I have a slow booting in Ubuntu 20.04.3 LTS. The output of $systemd-analyze blame is
`3.880s plymouth-quit-wait.service`
`2.493s snap-octave-78.mount`
`2.458s snap-so\x2dtrello-97.mount`
`2.429s snap-core-11606.mount`
`2.404s snap-gtk\x2dcommon\x2dthemes-1514.mount`
`2.296s snap-snap\x2dstore-547.mount`
`2.234s snap-gtk\x2dcommon\x2dthemes-1515.mount`
`2.164s snap-octave-182.mount`
`2.081s snap-snap\x2dstore-542.mount`
`1.964s snap-whatsdesk-23.mount`
`1.852s snap-core18-2128.mount`
`1.810s windscribe-cli.service`
`1.673s snap-kde\x2dframeworks\x2d5\x2dqt\x2d5\x2d14\x2dcore18-3.mount`
`1.550s snap-so\x2dtrello-93.mount`
`1.417s snap-kde\x2dframeworks\x2d5\x2dqt\x2d5\x2d14\x2dcore18-4.mount`
`1.328s snapd.service`
`1.144s snap-gnome\x2d3\x2d38\x2d2004-39.mount`
`1.116s snap-whatsdesk-24.mount`
`1.048s dev-loop3.device`
and the output of systemd-analyze critical-chain is
graphical.target @1min 34.623s
└─multi-user.target @1min 34.623s
└─windscribe-cli.service @1min 30.723s +1.810s
└─network-online.target @1min 30.708s
└─network.target @1min 30.708s
└─NetworkManager.service @1min 30.520s +187ms
└─dbus.service @1min 30.516s
└─basic.target @1min 30.503s
└─sockets.target @1min 30.503s
└─snapd.socket @1min 30.502s +494us
└─sysinit.target @1min 30.497s
└─systemd-timesyncd.service @2.959s +83ms
└─systemd-tmpfiles-setup.service @2.919s +36ms
└─local-fs.target @2.915s
└─snap-octave-78.mount @421ms +2.493s
└─dev-loop27.device @2.912s +10ms
