PaperMC
Add options to disable display entities ticking
Is your feature request related to a problem?
Display entities tick, but this is unnecessary unless you need them as passengers.
Describe the solution you'd like.
Separate options to disable ticking all four display entities (Display, TextDisplay, BlockDisplay and ItemDisplay) - and, if possible, interaction entities as well.
Describe alternatives you've considered.
I don't believe there are any.
Other
Someone proposed this on the Paper Discord last March, but I don't believe they followed through with making an issue.
I can't really think of a scenario where you would have enough display entities for this to become relevant where you also don't require their passenger/vehicle ticking functionality
Custom crops, furniture, etc are our current use-cases. The former in particular leads to thousands of DEs being loaded. Our use-case is such that we are not using the display entities as passengers, nor as having passengers.
In contrast to armor stands, which can be affected by collisions, gravity or flowing water, display entities do practically nothing in their tick method. Therefore, it really should not be necessary to prevent them from ticking.
I had a 40k display entities in the world and tps drops to 10 just because they exist.
Disabling ticking is most needed feature
I had a 40k display entities in the world and tps drops to 10 just because they exist. Disabling ticking is most needed feature
Don't forget that entities have other lags than just ticking, for example they need always to calculate who can see them, and if they need to update their data to players
Even if paper fully disables display entities ticking, 40k will still have a big impact on the server
Spark report with 50k item displays
As already suspected by some, the main issue (nearly 60% of tick time) seems to be the canSee checks and sending the updates to players, not the actual tick logic of the item display itself. I am not against adding such an option, seems easy enough. But I don't think it will have the positive effects you are hoping for.
Yeah, that too
Looks like minecraft wasn't ready for display entities
Is there is any fixes for canSee lags problem?
canSee is barely a real issue, I mixed that up a bit. The main performance loss comes just from tracking that many entities. You can improve that easily with a lower entity tracking range (spigot.yml). 50k entities at once also heavily slow the client down. I really wouldn't blame the game there though - it's just way way more than it was ever designed for.