server can't keep up when player is on same subnet/lan

server can handle 1-3 players as expected when logging in via WAN connection (port forwarded) but will lag more than expected when a single LAN player is added. single lan player can trigger "Can't keep up! Is the server overloaded? Running Xms or Y ticks behind" more frequently than 3 players playing remotely.

when this happens, remote players are affected by lag the most while lan players have only slightly noticeable issues. lan players would have slight rubber banding/food taking longer to eat/etc while remote players would have to wait triple the time for a block break to be registered by the server.

a single lan player playing normally would max one thread of cpu (which thread it was would alternate) regularly