Will it cause lag to have multiple worlds?

If there are 4 different worlds being occupied at once, will this cause more lag than if everyone was contained in only one world? If so, is there a way this can be fixed?

Thanks in advance. I posted here because this relates to a plugin I am making which involves the use of many worlds.

 

@ocomobock
Yes and no; What causes the lag is not that there is another world, but that there are more chunks that get loaded if they are in another world. If you need the players to be isolated (far away) from eachother in the same world vs different worlds, then the lag difference is negligible, because the same amount of chunks would need to be loaded in either scenario.

 

Ah okay, so it basically just comes down to how many chunks are being generated. This is good news for me, thank you.