Show article about async/await
Generated on 8/12/2024
1 search
The concept of async/await in Swift is a key feature for handling asynchronous operations. It allows functions to be marked as async, indicating that they may suspend execution to wait for an asynchronous operation to complete. The await keyword is used to denote potential suspension points within these functions.
In the session titled "A Swift Tour: Explore Swift’s features and design" at WWDC 2024, the use of async/await is discussed in the context of building a server. The session explains how tasks in Swift can perform asynchronous operations, such as reading from disk or messaging another service, and how they suspend to yield the CPU to other tasks while waiting for these operations to complete. This is part of Swift's concurrency model, which includes tasks, async/await, and actors to manage concurrent execution safely and efficiently.
For a deeper dive into the performance aspects of async/await, the session "Explore Swift performance" also covers how async functions are implemented, including how they manage memory allocation and function calls. This session explains that async functions are split into partial functions at runtime to handle suspension points, which helps maintain performance similar to synchronous functions, albeit with some overhead.
If you are interested in exploring these topics further, you might want to check out the following sessions:
Go further with Swift Testing
Learn how to write a sweet set of (test) suites using Swift Testing’s baked-in features. Discover how to take the building blocks further and use them to help expand tests to cover more scenarios, organize your tests across different suites, and optimize your tests to run in parallel.
A Swift Tour: Explore Swift’s features and design
Learn the essential features and design philosophy of the Swift programming language. We’ll explore how to model data, handle errors, use protocols, write concurrent code, and more while building up a Swift package that has a library, an HTTP server, and a command line client. Whether you’re just beginning your Swift journey or have been with us from the start, this talk will help you get the most out of the language.
Migrate your app to Swift 6
Experience Swift 6 migration in action as we update an existing sample app. Learn how to migrate incrementally, module by module, and how the compiler helps you identify code that’s at risk of data races. Discover different techniques for ensuring clear isolation boundaries and eliminating concurrent access to shared mutable state.
Explore Swift performance
Discover how Swift balances abstraction and performance. Learn what elements of performance to consider and how the Swift optimizer affects them. Explore the different features of Swift and how they’re implemented to further understand the tradeoffs available that can impact performance.