Swift 6 easy concurrency
Asked on 06/16/2025
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Swift 6 introduces several enhancements to make concurrency easier and safer. In Swift 6.2, the language mode is designed to make concurrent code safer by default, reducing the risk of data races. This is achieved by allowing developers to configure modules or individual files to run on the main actor by default, which simplifies writing single-threaded code. Additionally, Swift 6.2 provides better language defaults for making async calls from the main actor, generating fewer compiler warnings for code not intended to run in parallel.
For more detailed information on concurrency in Swift 6, you can refer to the session Embracing Swift concurrency (10:22), which covers the introduction of concurrency and how to use it effectively in your applications.
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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.
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.