(In the context of a multiplayer server.)
It is said that villagers cause lag.
It is said that any item/block awaiting player inputs (hoppers, furnaces… but even chests) cause some lag to some extent.
Hence I’m wondering:
Do Nitwits (green coat villagers) cause less lag than other villagers? … due to the fact that they can’t open a dialog box when clicked.
Are there official information? Benchmarks? Some knowledge about this?
nitwits aren't any different lagwise than other villagers. The reason why villagers are laggy is because of their AI, which is checking the time of day, looking for zombies to run away from, and figuring out where to go.
Brown coats are likely more laggy as they need to check for farmland/crops, on top of what all other villagers do.