[MCPE-23700] Nether Lag in Multiplayer Created: 28/Jul/17  Updated: 22/Dec/17  Resolved: 22/Dec/17

Status: Resolved
Project: Minecraft (Bedrock codebase)
Component/s: None
Affects Version/s: 1.1.4.51
Fix Version/s: None

Type: Bug
Reporter: megashub
Resolution: Duplicate Votes: 1
Labels: None

Game Mode: Survival
Confirmation Status: Unconfirmed
Platform: Windows

 Description   

When playing with just me locally (without a remote player connected), I can use portals to move between the Overworld and the Nether just fine. I can also play fine while in the Nether. However, once a remote player joins, the MCPE client takes minutes to switch into or out of the Nether. The game's performance for both the local and remote player degrades to a near-unplayable state while either (or both) players are in the Nether.

When switching into or out of the Nether, the client can easily (but not always) crash to desktop without presenting an error message if the player tabs out and back in again while waiting for the dimension to load.

There is nothing special about our map. Only three players and very little development so far. We've only explored about an 8000-block radius around our spawn point so far.

Lastly, while loading dimensions (into or out of the Nether), the host player can run Resource Monitor and observe that the CPU load is between 65 and 100% pegged, and once the dimension load finishes, the CPU load drops significantly. Please note that I have an 8-core 4Ghz CPU: AMD FX-8350 and 32 GB of RAM. Memory and disk I/O are nominal when this happens. Only CPU seems abnormally high. See screenshot attached. It shows a slice of time while loading the dimension, and immediately after the loading is complete.

Sidenote: Any animals traveling in minecarts in the Nether which are traveling through unloaded chunks when the client crashes will be lost completely. Both the minecart and its occupant are gone when the game is reloaded.


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