LethalPerformance

LethalPerformance reduces CPU work, allocations, and common frame-time spikes in Lethal Company. It is designed to work alongside gameplay and content mods without changing gameplay.

For support or discussion, use the Discord channel at Discord thread.

What it improves

• Caches frequently searched game, network, moon, dungeon objects to avoid repeated FindObjectOfType-style work.
• Reduces allocations and main-thread work in common paths.
• Reduces save-related hitching by caching Easy Save 3 file data and scheduling saves.
• Tunes HDRP defaults to reduce unnecessary memory use, including the reflection-probe texture cache.

Useful shortcut

Press Ctrl + Shift + L to open the Unity log folder. This is useful when reporting a problem.

Troubleshooting

My screen is black [Failed to find "lib_burst_generated.data"]

Disable Kaspersky or other types of antivirus. After that, uninstall the mod, click to clean up unused mods, and then reinstall the mod. It should download correctly.

The log says that the Reflection Probe Atlas or 2D Cookie Texture Atlas is full

Increase the matching LethalPerformance rendering setting.

I see an "Entrance teleport mismatch" tip

Another mod likely prevented an entrance teleport from spawning correctly. Expect the affected entrance to report that it is blocked; update or temporarily remove recently added moon/interior mods to identify the conflict.

The log warns that Terbium is installed

Remove Terbium for better compatibility with LethalPerformance.

Recommended mods

For a preconfigured pack of performance and bugfix mods that you can add to any modpack, use Starter Pack by ThecheeseXD.

LethalPerformance also works well with:

• AsyncLoggers by Matty_Matty - processes logs on a separate thread so log spam does not hitch the game.
• BepInEx Faster Load AssetBundles Patcher by DiFFoZ - decompresses asset bundles to disk to cut startup time and RAM use.
• PathfindingLagFix by Zaggy1024 - moves vanilla AI pathfinding off the main thread.
• NavMeshLib by TRizzle - rebakes NavMeshes in the background instead of blocking the main thread.
• CullFactory by fumiko & Zaggy1024 - stops rendering interior rooms, items, and lights that aren't visible.
• LethalSponge by Scoops - adds camera FPS limits, scrap culling and LODs, graphics options.
• ReXuvination by XuXiaolan - cuts unnecessary collision/trigger work for enemies, players, doors, landmines, and other objects.

Credits

• Icon by Lorc via game-icons.net