swift-concurrency-6-2

Swift 6.2 concurrency prevents data races by keeping async calls on the calling actor by default, ensuring single-threaded execution. You enable MainActor default inference and apply isolated conformances to safely migrate your app without unsafe workarounds.

MainActor default inference in Swift 6.2 reduces boilerplate by automatically inferring actor isolation for types in app targets. It keeps async execution on the main actor by default, preventing data races without requiring explicit annotations for every function.

Use @concurrent in Swift 6.2 for explicit background work when offloading CPU-intensive tasks. Because Swift concurrency is single-threaded by default, @concurrent provides opt-in concurrency to safely execute heavy computations away from the calling actor.

Isolated conformances in Swift 6.2 allow MainActor types to conform to protocols safely without unsafe workarounds. They maintain actor isolation during protocol conformance, eliminating data race risks while preserving type safety across your Swift app migration.

Yes, Swift 6.2 concurrency supports stepwise enablement and tooling support for gradual adoption. You can migrate your existing app incrementally by enabling MainActor default inference in project settings and refactoring code to use isolated conformances progressively.

Swift 6.2 keeps async calls on the calling actor by default to reduce data-race errors through single-threaded execution. This default behavior simplifies safe concurrency patterns, requiring explicit @concurrent annotations only when background processing is necessary.