give me news about concurrency
Asked on 06/19/2025
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At WWDC, Apple introduced several updates and improvements related to concurrency in Swift. Here are some key highlights:
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Swift 6 Language Mode: Swift 6 introduces a language mode that achieves data race safety by default, turning potential data race issues into compile-time errors. This significantly enhances the security and stability of apps by preventing data races, which are common errors in concurrent programming (What’s new in Swift).
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Concurrency in Swift: Swift's concurrency model is designed to make concurrent code easier to write correctly. It identifies shared data across concurrent tasks and helps catch potential data races at compile time. This allows developers to introduce concurrency as needed without fear of creating difficult-to-fix data races (Embracing Swift concurrency).
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Concurrency Safety in Xcode 16: Xcode 16 provides concurrency safety guarantees by turning data races into compile-time issues. Developers can start adopting these features incrementally by enabling warnings for upcoming language features (What’s new in Xcode 16).
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Migration to Swift 6: The migration to Swift 6 includes tools and strategies to help developers adopt new concurrency features and ensure data race safety. This involves updating code to use actors and async/await patterns, which help manage concurrency more effectively (Migrate your app to Swift 6).
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Concurrency in SwiftUI: SwiftUI leverages Swift concurrency to help build fast and data race-free apps. The framework uses concurrency annotations to express runtime semantics, making it easier to manage concurrent tasks in SwiftUI applications (Explore concurrency in SwiftUI).
These updates aim to make concurrency more approachable and safer for developers, enhancing app performance and reliability.
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.
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.