How do I avoid copying with copy-on-write semantics in Swift?

Learn how to optimize memory usage in Swift by avoiding unnecessary copying of data when using copy-on-write semantics. This guide provides practical examples and tips to help you manage memory effectively.
Swift, copy-on-write, memory management, optimization, performance
// Swift Example of avoiding unnecessary copies class MyClass { var data: [Int] init(data: [Int]) { self.data = data } } func demo() { let array1 = [1, 2, 3, 4, 5] var instance1 = MyClass(data: array1) // Directly using the data prevents copy var instance2 = instance1 instance2.data[0] = 10 // Change won't affect instance1 print(instance1.data) // Output: [1, 2, 3, 4, 5] print(instance2.data) // Output: [10, 2, 3, 4, 5] } demo()

Swift copy-on-write memory management optimization performance

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