Base information

• Minecraft version:1.12.2
• Mod version:2.3.21.342
• Minecraft Forge version:
• Mod Pack: (if applicable)
  

No.it's not a error.but it use half of performance.
linkedlist search speed is too slow.Could you fix it?

I can optimise that. But how many chunks do you have loaded? I suspect you would need an insane number of chunks to be loaded for that to be an issue...

No.Only 500-700chunks.But even though my server don't have anyone.It still likes this. (50% isn't not so high.It always 80%.)