Only run update system when there are changes to an inspected resource

[askor]

In the demo example, a system continuously runs to update entities with the Data resource. This seems inefficient if the project grows, and the number of inspectors and entities becomes large. I would like the update system to only run when I change values in the inspector.

How can I only update components when there are changes to the inspected resource?

[jakobhellermann]

You can add

if !data.is_changed() {
    return;
}

to your function, bevy-inspector-egui should only mark resources as changed if they were actually edited.