My server is lagging too much

hello, my server is lagging too much and I think it's because of the anvil format worlds.
The server type is SkyBlock, so loaded a lot of worlds.
Timings: https://timings.pmmp.io/?id=4245

 

What do you do in HashTask?

 

Clear items, send broadcast and restart timer.

I think the problem consists of anvil worlds

 

It can't be. Just read the timings again.

 

Wait, are you saving the world twice every second?

 

No

 

Just every 10 minutes console commanding /save-all