Sorry for bad translation 
Help me please
I can not play with a friend becouse multiplayer lagging without any mods. I testing it. I start tmodloader server on a laptop , set high priorities. (laptop have 4 core and 4 ram) [i think this is quite should suffice]
Tmodloader (Terraria) i run on PC and connect on server. My friend too conect on server.
And without any mods server lagging (server lag \ server is lagging). = mobs and npc and players (my friend) teleported short distances instead of running.
at my friend terraria was freezes (inhibited \ delayed \ [ slow motion ] ) but my friend say that fps was normal
I have not slowed down the game but mobs and etc. teleported
Why is it occur !?? What should I do? I want to play with a friend without lag !
I want to play with Thorium mod example. It is possible?

Help me please
I can not play with a friend becouse multiplayer lagging without any mods. I testing it. I start tmodloader server on a laptop , set high priorities. (laptop have 4 core and 4 ram) [i think this is quite should suffice]
Tmodloader (Terraria) i run on PC and connect on server. My friend too conect on server.
And without any mods server lagging (server lag \ server is lagging). = mobs and npc and players (my friend) teleported short distances instead of running.
at my friend terraria was freezes (inhibited \ delayed \ [ slow motion ] ) but my friend say that fps was normal
I have not slowed down the game but mobs and etc. teleported
Why is it occur !?? What should I do? I want to play with a friend without lag !
I want to play with Thorium mod example. It is possible?