fvtt-performance-safe-updates

To prevent multi-client update storms in Foundry VTT, apply safe update patterns using ownership checks, no-op guards, and batched updates via a dedicated queueUpdate wrapper to avoid database write conflicts.

The best way to handle embedded document updates without UI flicker is to perform atomic operations that replace items or abilities directly, preventing the delete and create sequence from triggering spurious redraws.

To stop unnecessary sheet re-renders during Foundry VTT module development, guard your rerenders to refresh only owned or visible sheets and let Foundry handle renders to keep all clients in sync.

Race conditions happen when updating actors across multiple Foundry clients because synchronous database writes clash during session syncing, requiring queued updates to enforce safe persistence and preserve synchronization.

Yes, you need ownership checks before updating shared documents in Foundry VTT to ensure only authorized users perform updates, which prevents unauthorized data modification and reduces unnecessary database writes.

Yes, you can batch updates in Foundry VTT to minimize database writes by detecting no-op changes and queuing updates, ensuring that only necessary data modifications are persisted across the session.