Chunk loads extremely slow

Chunk loads EXTREMELY so slow, im using anvil format for every worlds i have.

And also, every packets got delayed to client before chunk load properly.

For example, player send a message and console read it as well. But, player did not receive their messages.

Its also happened with sprinting / sneaking, eating / exhausting, etc.

I have 20 TPS average anyway.
Its so strange for me, i'm using latest commit on 25 January.

Any advice, recommendation, or help are very welcome! Thanks.

 

This seems like a problem with your internet connection.

 

Yes.
This commit are better than latest one. I dont know what happen with network or something.
I always tracking and monitoring my server's resources usage (such: network connection, bandwidth, CPU, and RAM). There is no alert about overloading or something that affect to performance.

And i hope this pull will solve everything.

EDIT: When every packet got delayed, my console spammed by notice message "{player} moved too fast!" and debug message "Old position: ...". Then, after chunk loaded, player will receive everything properly and that notice message are stopped.

Problems:
* When delay happened, all packet seems fine with server.
For example, A is a player and assume that every worlds has Anvil format:

1. Teleporting to another world or location.
A teleported to world that has DEFAULT generator from FLAT world (its rarely happen if they teleport to FLAT generator). A starting delayed for a while (he did'nt see any chunks for 5~10 second, its not constant so i can't tell exactly). Then, chunks loaded very slowly.

2. Player got delayed, but others don't.
While A got delayed, A send a chat "Hello world", and other player (for example: B) receive a message from A ("Hello world") without delay, but A still did'nt receive any message.
I could put hunger as example too:
Before A teleported to somewhere, he has Full (20) hunger bar. After he took a long delay, his hunger will decreased to (2~6, depends how long his delay).

3. Everything back to normal.
After A see all chunk loaded near him, now he can do everything normally.

4. Delay happen again.
A tried to explore the worlds, he move so far. When chunk load, he got delayed again.

Thats what happen to my server @dktapps

 

If it was related to client's connection, they has ping 20~110 (and i thought it's not bad for Minecraft Server)

 

UPDATE: I can confirm that 1e673600485c87c9e31b18ba32fef8fe0b327e2e better than newest commit. (tried with same settings, same device, and run without or with plugins.)

 

Thanks for that, i tried to set it to 1308 *i did some test with ping to determine my optimal MTU size*. I'll wait my client's report after this update.

Anyway, could i use all of my CPU to work to load chunks? I mean, how to optimize chunks performance with my CPU. (Async-workers has good value right now).