💡 Make `update` more fine grained about what to update

[pjechris]

Summary

Today when update closure is called the whole value is updated even if:

• not all its relationships changed
• maybe even nothing changed at all

Idea would be to:

• do nothing when nothing changed (no update or update applied the same value)
• only update what changed (if a nested entity did not change: do not update it)

Basic Example

// BEFORE: triggers an update on A and all its children
// AFTER: triggers nothing
identityMap.store(A.self, id: a.id) { _ in
}


// BEFORE: triggers an update on A, B and C
// AFTER: triggers an update on A and C (B did not change)
identityMap.store(A.self, id: a.id) {
  $0.b = $0.b
  $0.c = newValue
}

Unresolved questions

No response