The “Observation Is More Efficient” Myth

Still using ObservableObject? That's just fine. The "Observation Is More Efficient" Myth Still using ObservableObject? That's just fine. Michael Long   ∙   May 10, 2025   ∙   8 min read   ∙   View on Medium Image Via PhotoGratis Ever since Apple introduced the new @Observable macro with Swift 5.9 and iOS 17, there's been a steady stream of posts claiming that ObservableObject is obsolete. Outdated. Inefficient. That, like AnyView, it should be completely purged from your project and totally banished from the realm. You've probably heard the sales pitch. Observable is more efficient. It tracks which properties are used in the view and only re-renders when those properties change. Meanwhile, ObservableObject just blasts out objectWillChange events and that causes everything to update. Don't use it anymore. But like a lot of the "common knowledge" parroted about in iOS… Continue reading This is a member-only story and can only be read on Medium. Sent to sikubaycom.s3cr3tz@blogger.com by Michael Long on Medium Unsubscribe from this newsletter or unsubscribe from all newsletters from Medium Manage your email settings 3500 South DuPont Highway, Suite IQ-101, Dover, DE 19901 Careers·Help Center·Privacy Policy·Terms of service