idle master doesn't drop anything and doesn't count the hours in the games, how do I solve it?

In PR lloesche/valheim-server-docker#21 we added two CLI options to the server.

Can we have someone knowledgeable in Unity Game development clarify the exact effect of running the server with

-nographics -batchmode

The PR says This leads to 10% less CPU usage and less desync lag on my server. Before merging I tested the option and while I did not see any