Memory Optimization Journey for a SwiftUI + Core Data App

Despite the lazy containers of SwiftUI and the memory optimization mechanisms of Core Data, as the complexity of application views increases (such as mixed text and images), more and more developers are encountering situations where memory usage is so high that it causes the app to crash. This article will go through a step-by-step memory optimization process for a demo app (originally using 1.6 GB of memory to display 100 data items, optimized to display hundreds of data items using only 200 MB memory). This will provide readers with a better understanding of the persistence period of SwiftUI views, the lifecycle of subviews in lazy views, the lazy properties of managed objects, and the row cache of the persistence store coordinator.

The code required for this article can be downloaded from here.

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