Comment # 4 on bug 982061 from Dr. Werner Fink

(In reply to Dominique Leuenberger from comment #3)

> there is a 9s stop-gap in rc-local.service

>From /usr/lib/systemd/system/rc-local.service ...


 [Service]
 Type=forking
 ExecStart=/etc/init.d/boot.local start
 TimeoutSec=0
 RemainAfterExit=yes
 SysVStartPriority=99


that is that /etc/init.d/boot.local is installed empty (beside comments).

IMHO there had been something added to /etc/init.d/boot.local by third party or
reporter them self which slows down boot

I'm entertain some doubt that this is systemd