Sometimes "Purge old kernels" service does not run after booting, but during
boot, which slows down boot:

$ LC_ALL=C journalctl -b 0 |grep -i purge
Apr 20 08:16:01 dell5510 systemd[1]: Starting Purge old kernels...
Apr 20 08:16:02 dell5510 zypper[1546]: Preparing to purge obsolete kernels...
Apr 20 08:17:09 dell5510 systemd[1]: purge-kernels.service: Deactivated
successfully.
Apr 20 08:17:09 dell5510 systemd[1]: Finished Purge old kernels.
Apr 20 08:17:09 dell5510 systemd[1]: purge-kernels.service: Consumed 53.594s
CPU time.

It started few weeks ago, it does not happen every boot, but maybe once a week.
But bothered me enough to report the problem.

$ LC_ALL=C rpm -qi purge-kernels-service
Name        : purge-kernels-service
Version     : 0
Release     : 8.4
Architecture: noarch
Install Date: Tue Feb 22 11:51:00 2022
Group       : Unspecified
Size        : 346
License     : MIT
Signature   : RSA/SHA256, Sat Feb 19 22:50:00 2022, Key ID b88b2fd43dbdc284
Source RPM  : purge-kernels-service-0-8.4.src.rpm
Build Date  : Sat Feb 19 22:37:41 2022
...

$ lsb_release -a
LSB Version:    n/a
Distributor ID:    openSUSE
Description:    openSUSE Tumbleweed
Release:    20220415
Codename:    n/a