Multiple Worlds/Engines randomly "freezing"

I’m currently working on a multiplayer game, each server has multi-world support. For each world, I have to create a Matter World, Engine, and Runner (nothing in the documentation says I can run multiple Worlds with the same Engine).

Randomly, either the Engine or the Runner for all of the worlds completely stops working, freezing physics on the server-side. There is no pattern, it just happens. The problem does not resolve itself until the server is completely restarted.

For context, there are roughly 10 - 12 worlds running simultaneously per server, each world can have anywhere from 10 to 100 entities (projectiles and players) at a time.

Is there a limit to how many Engines I can have running concurrently without Matter breaking?

[retroscepter]

Nope, I think I’ve fixed everything. I resolved some other performance issues (like relying on getters) that had nothing to do with Matter. Thank you!

[retroscepter]

I fixed the issue by using a separate engine update loop from the game loop (just a setInterval running at 60 fps) for each world.

My game loop runs at 50ms (all worlds and entities are updated, entity update packets are sent every 50ms), but I can’t seem to run Engine.update every 50ms, even when specifying 50 as the delta. The updates don’t scale with the delta and the Engine move 3x faster than real-time, it only works at 60 fps.

Also, to clarify, there was no resource leakage and minimal CPU usage when using the Runner.