Looking for logging into the Kubuntu Slow site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Kubuntu Slow site. After that you can login as usual with your login credentials.
https://www.kubuntuforums.net/showthread.php/69372-KDE-login-slow
https://askubuntu.com/questions/769414/slow-startup-of-plasma-5-5-in-kubuntu-16-04
https://bugs.launchpad.net/bugs/1584604
https://www.reddit.com/r/kde/comments/9hqzvg/help_plasma_has_very_slow_boot_times/
https://forum.kde.org/viewtopic.php?f=154&t=132734
https://forums.mauilinux.org/showthread.php?tid=24578
https://ubuntuforums.org/showthread.php?t=2390598
https://forum.manjaro.org/t/kde-login-takes-a-while/27911
https://superuser.com/questions/1171967/kde-plasma-slow-login-to-desktop
https://www.dedoimedo.com/computers/ubuntu-beaver-slow-boot.html
https://forum.ubuntuusers.de/topic/kde-login-50s-verzoegerung/
https://www.quora.com/Why-is-KDE-desktop-so-slow-compared-to-Gnome-It-takes-double-the-time-to-boot-into-KDE
http://forums.debian.net/viewtopic.php?f=6&t=138379