Question Does placing a furnace above a hopper reduce lag on Paper?


New member
Mar 17, 2022
In vanilla MC, placing a block with an inventory above a hopper prevents it from taking in item entities from the world, reducing lag. Does this still help on a Paper server, or have hoppers been optimized to a point where this is unnecessary?

Additionally, if this still reduces lag, has placing a full block without an inventory, preventing pickups, the same effect? In vanilla, the lag reducing effect only works when a block with an inventory is used, but since full blocks prevent hoppers from actually picking up items, do they work as well on Paper?

Otherwise, I would love to see this as a feature that can be enabled in paper.yml.
Version Output
git-Paper-268 (MC: 1.18.2)
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New member
Feb 8, 2022
Pretty sure just placing a full block over a hopper won't prevent lag as the hopper would still try to pick up stuff... A common block used is a composter as it pretty much does what a furnace does: Block the item pickup.

In terms of performance improvement is there not much I can say other than using a profiling plugin like Spark to check if performance improved when applying those tricks.