My Debian Stretch system takes nearly a minute to boot up. It usually takes about 15 seconds.
Gave up waiting for suspend/resume device fsck: error 2 (No such file or directory) while executing fsck.ext4 for /dev/sda1 fsck exited with status code 8
Note: I migrated my physical Debian box to Virtualbox. I did not have these error on the physical machine and it booted very quickly.