A Deep Dive Into Observation: A New Way to Boost SwiftUI Performance

Before Swift 5.9, Apple did not provide developers with a unified and efficient mechanism for observing changes to reference type properties. KVO is limited to use by NSObject subclasses, Combine cannot provide precise observation at the property level, and neither can achieve cross-platform support. In addition, in SwiftUI, the source of truth for reference type data sources is implemented using the ObservableObject protocol based on the Combine framework. This leads to a large number of unnecessary view refreshes in SwiftUI, which affects the performance of SwiftUI applications. To address these limitations, the Observation framework was introduced in Swift 5.9. Compared to existing KVO and Combine, it has the following advantages: <a href="https://betterprogramming.pub/a-deep-dive-into-observation-a-new-way-to-boost-swiftui-performance-f299831c664b">Learn More</a>