swift-concurrency-6-2

Swift 6.2 approachable concurrency prevents data races by keeping async work on the calling actor and making background offloading explicit, ensuring single-threaded execution by default.

Migrate your SwiftUI project by enabling MainActor default inference through incremental build settings, adopting isolated conformances, and selectively applying @concurrent for CPU-intensive tasks.

Use @concurrent for background work in Swift when you need to opt-in to explicit background offloading for CPU-intensive tasks, keeping standard async work on the calling actor.

Isolated conformances let you safely model MainActor types conforming to protocols without unsafe workarounds, ensuring data race safety while maintaining an incremental migration path.

Migrate server-side Swift projects to Swift 6.2 by enabling explicit concurrency features via build settings, adopting MainActor defaults, and incrementally applying isolated conformances safely.

Swift 6.2 avoids implicit background offloading for asynchronous functions to maintain single-threaded execution by default, preventing unintended data races while making concurrency opt-in.