Jet suit and vole pathing causes noticeable slowdown in colonies where a large part of the map is discovered, space is reachable by jet, and abyssalite layer separating space and asteroid is breached.
Attached save for easier reproduction on live data. Left of printing pod, there is a jet suit checkpoint which can be enabled/disabled by configuring the pneumatic doors. In the upper-left corner of the map, there are unconfined voles. Below printing pod, there are confined voles (those do not cause lag).
Removing the unconfined voles and disabling the jet suit checkpoint causes a noticeable performance boost on my low/mid end machine. Didn't measure it objectively, but it's clear to the naked eye, something like 30% fps increase.
Steps to Reproduce
Load attached save. Check fps. Kill voles in upper left and disable jet suits. Check fps again.
Status: Known Issue
We are aware of this issue and have it logged internally but either we do not have a fix ready yet or we are not planning on addressing the issue in the immediate future.