swift concerrency
Asked on 06/16/2025
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Swift concurrency is a significant focus in recent WWDC sessions, particularly in the sessions "Embracing Swift concurrency" and "What’s new in Swift." Swift's concurrency model is designed to make concurrent code easier to write correctly, allowing for multiple tasks to be performed simultaneously, which can improve app responsiveness and performance.
Key Points on Swift Concurrency:
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Concurrency Model: Swift's concurrency model includes async/await, actors, and structured concurrency. These features help manage asynchronous tasks and protect mutable state, reducing the risk of data races.
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Data Race Safety: Swift 6 introduces data race safety by default, turning potential data race issues into compile-time errors. This enhances app security and reduces debugging time.
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Concurrency in Practice: The session "Embracing Swift concurrency" discusses how to introduce concurrency into your app, focusing on using concurrency to improve performance without introducing complex bugs.
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Migration and Tooling: Swift 6.2 includes migration tooling to help developers adopt concurrency features more easily. These tools are available in Xcode and can be enabled in project settings.
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Practical Application: The session "Code-along: Elevate an app with Swift concurrency" provides a practical example of how to use Swift concurrency to improve app performance by offloading tasks to the background and running them in parallel.
For more detailed information, you can watch the session Embracing Swift concurrency (00:00:00) or explore the concurrency updates in What’s new in Swift (00:30:28).
Embracing Swift concurrency
Join us to learn the core Swift concurrency concepts. Concurrency helps you improve app responsiveness and performance, and Swift is designed to make asynchronous and concurrent code easier to write correctly. We’ll cover the steps you need to take an app through from single-threaded to concurrent. We’ll also help you determine how and when to make the best use of Swift concurrency features – whether it’s making your code more asynchronous, moving it to the background, or sharing data across concurrent tasks.
What’s new in Swift
Join us for an update on Swift. We’ll talk about workflow improvements that make you more productive, and new and modernized library APIs for fundamental programming tasks. We’ll show examples of Swift adoption throughout more layers of the software stack. Finally, we’ll explore new language features for both improving approachability of concurrency, and achieving peak performance when you need it.
What’s new in Swift
Join us for an update on Swift. We’ll briefly go through a history of Swift over the past decade, and show you how the community has grown through workgroups, expanded the package ecosystem, and increased platform support. We’ll introduce you to a new language mode that achieves data-race safety by default, and a language subset that lets you run Swift on highly constrained systems. We’ll also explore some language updates including noncopyable types, typed throws, and improved C++ interoperability.