explain actor isolation
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Actor isolation in Swift is a feature that helps manage concurrency by ensuring that only one task can access an actor's state at a time. This is achieved by serializing access to the actor's methods and properties, which prevents data races and ensures thread safety.
In the context of Swift 6, actor isolation is further enhanced with features like "assume isolated," which allows you to inform the compiler that certain code is already running on a specific actor, such as the main actor. This can prevent unnecessary asynchronous tasks and help maintain performance while ensuring safety. Additionally, Swift 6 introduces full enforcement of data isolation, preventing accidental sharing of state between tasks and actors, which can significantly improve the quality of concurrent code by catching potential issues at compile time.
For more detailed information, you can refer to the session Migrate your app to Swift 6 (19:29) which discusses delegate callbacks and concurrency, and how actor isolation is applied in practice.
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