ConnyMercier write
Q1: Wenn using parameters start-date and start-time
does RouterOS have to recalculate Next run every single time from these parameters or only on startup?
When you change start-time then next run will change, be calculated.
When you change interval then next run will change, be calculated.
When you change start-date to past then this not change anything but if you put start-date as feature date then of course it will recalculate and it will be waitng to that date.
Q2: Would it make a performace difference to change the schedule start-time to startup ?
When you use start-time=startup then start-date is ignored. It's just wait for reboot action to run on-event.
This is similar to crontab the @reboot triger.
About "performace difference" I not know what you mean. I use only one startup scheduler at time, never use few with that action. And every time when I use startup action I use at first line the "delay 20s" because I want to ROS finish initialization all his interfaces, connecting vpn's etc.