Reducing lagg via default settings

Hi, so I'm trying to reduce lagg. In the game default settings I have enabled give all tokens vision and night vision in Dynamic and advanced lighting. This is very helpful for when my players change their own character token however is it possible this is causing more lagg via the Maps, and items I place on the board that potentially don't need this?

Hi Some time back there was a problem where any more than 15 tokens with vision on (can't say that without fond childhood memories of plasticine figures, but we digress) and so I quickly learned to make sure there were no duplicates of PC tokens loafing about. This habit has stuck, though I don't think that problem still exists, but we never experience lag, so I would suggest it is probably good practice to limit vision to only those tokens where it is essential. Using API for a patrolling guard for example I have given that token tinted, directional vision so I can be absolutely clear about what they can see, but generally I think you can eyeball a map and say whether an NPC has LOS or not. TL;DR I prefer to only give it to PCs and I delete all their tokens except for the live map, we don't experience lag

Multiple tokens with sight turned on are not supposed to cause an increase in lag, though to me that sounds counterintitive. What you will notice is confusing lighting if all NPCs have vision. The GM sees the vision of all active tokens they control, and this can give confusing results. Example: four goblins who all have night vision, placed in an unlit room can make that room look brightly lit  to the GM,  as their dim vision overlaps and brightens. For this reason, all Roll20 modules ship with npc vision set, but not active. My preference and advice is to do similar. If you specifically need to see through a token's eyes by using Ctrl-L, the interface now allows you to turn that feature on via a supplied button .

Hi CaptainJesus,  I've seen other GM users report similar experiences when having a lot of NPC tokens with Vision turned on. Turning them off helped. 

ok Thanks everyone