ValheimCommunityPatch

Valheim Community Patch

Vanilla bug fixes and performance fixes. No gameplay changes.

This mod exists to fix things that are broken or pathologically slow in Valheim itself — crashes, exceptions that silently kill a system, item loss, quadratic hot paths, per-frame allocations, log spam. It deliberately ships no quality-of-life features, no balance changes, and no content, so you can install it on a server without anyone having to agree about how the game should play.

Performance fixes are always on; the config holds only their tuning values and the admin-only Verify diagnostics. Correctness and terrain fixes each have their own toggle. Server memory fixes are the exception: they are off by default and opt-in, see Server memory. The dedicated-server garbage collector settings moved to a separate plugin, see Server garbage collector. Config values are admin-only and server-synced.

Each fix is tagged with the side it is worth installing on. (server) fixes only do something on the machine hosting the world — a dedicated server or a listen host. (client) fixes need a local player, and are not even applied on a dedicated server, which is why the startup log there reports a smaller number. (both) fixes do work wherever they are installed. A one-sided install is safe; it just gets you a subset. See Installation.

Why so many fixes are client-side

A Valheim dedicated server is not a simulation host. It only creates game objects inside its own active area, and a dedicated server never has a player to anchor that area to, so the game parks it far outside the world for the whole run. Creatures, fires, chests, tar pits and everything else near a player are created, owned and simulated on that player's client; the server holds the data and relays it.

So the fixes a server gains from are the data-and-network ones — ZDO handling, world load, packet allocation, socket logging — and almost everything else is worth having on the client.

Performance Side by Side

Terrain Fix comparison

| Terrain Tears | Terrain Fixed | |---|---| | | |

| Shore Shade Tears | Shore Shade Fixed | |---|---| | | |

Shore tears are much more subtle as it is a shading issue. On the right side of the first image directly above the head you can see the shading issue.

Fixes in this release

Where a fix was sourced from, or corroborated against, another modder's work, that is recorded per fix under Credit and sources.

Performance