Mojira Archive
MC-229977

Breaking blocks with pistons on the east/west direction causes significant lag

The bug

Blocks that break when a piston tries to push them like moss blocks, that also have something else that breaks right after the one below breaks, like tall grass, where the piston is facing east/west causes the game to have a huge lag spike. On the north/south direction it causes a lag spike, but it's far far worse on the east/west direction. It's much worse than it was in 1.16.

West:

North:

How to reproduce

  1. /fill ~ ~ ~ ~ ~ ~4 minecraft:piston[facing=west]
  2. Place moss blocks below the pistons, and below their heads (see 2021-06-23_11.21.50.png)
  3. Place blocks above the pistons, and redstone above those blocks
  4. Place tall grass on the moss blocks below the fronts of the piston heads
  5. Place a redstone block above the redstone above the pistons

Fixed

end99

[Mojang] Gnembon

2021-06-23, 03:22 AM

2021-11-18, 03:50 PM

2021-11-18, 03:50 PM

6

5

Confirmed

Important

Performance

1.17, 1.17.1 Pre-release 1, 1.17.1

1.18 Pre-release 5