Nikita Vasilev

The Death of Unnecessary Thread Hopping: Inside Swift 6.2 Approachable Concurrency

When Swift Concurrency was introduced, marking an async method as nonisolated on an actor often caused an immediate and unexpected context switch to the global cooperative pool on reaching an await. In Swift 6.2, NonisolatedNonsendingByDefault reverses that default, allowing async functions to inherit and preserve thei...