Issue explanation

Crossing a chunk border occasionally occur a lag spike, with or without blocks

Mojira issue link

https://bugs.mojang.com/browse/MC-162253

Other

Paper removed the patch in 1.17, as far as how the comments said
One of my server does use PaperMC 1.18.2 and yes, I do experience lag spikes whenever crossing a chunk border

A demonstration:

• Clear chunks: https://streamable.com/8ikjwd
• Chunks has blocks (take the tree for example): https://streamable.com/miq4mm
  ^ Above were singleplayer, Vanilla Minecraft

This isn't noticeable when running on a good PC, but for low-end PCs, this is a problem.
A comment for the code analysis: this comment