[1.21.1] Sable Sub-Level Saves Causing Server Lag Spikes

[LilJagty]

Description

Steps to reproduce:

1. Open singleplayer ( or possibly multiplayer ) world with Sable and Aeronautics installed
2. Play the game
3. Notice that occasional Sable "Saving sub-levels for.. " messages in logs correspond with massive lag spikes that freeze the game for multiple seconds

Game Log

https://mclo.gs/BNJSZcr

[SashaShtal]

• same. Scales with player count on a local server

[Isomaltuloza]

I notice this seems to be particularly worse when you have more dimensions, as sable tries to save sublevels in every dimension at the same time causing little lag spikes, even when the dimensions have not been loaded/visited.