Fast and Flexible Change Detection

[ecoskey]

Goal Description

Bevy's component change detection is always on for all components, some of which may not need it, and is too slow for some critical systems that do, like rendering and physics simulations. In particular, iterating a query with a Changed filter requires a "table scan" that checks every entity in the query one-by-one. Change detection should be opt-in, configurable on a per-component basis, and flexible enough to adapt to different performance requirements.

Goal Status

This is a potential Bevy Project Goal. Its state on the Project Goals Board determines if it is Proposed, Postponed, Blocked (Approved), Inactive (Approved), Active (Approved), Completed, or Declined.

• Staffing SMEs: Not yet staffed
• Working Group Link: Working Group not yet formed
• Design Documents: Design documents not yet written