swift-concurrency-6-2

To resolve data race errors in Swift 6.2 concurrency, apply single-threaded main actor isolation using @MainActor and offload parallel tasks to background threads with @concurrent, ensuring safe concurrent execution without compromising performance.

The best way to use @MainActor in Swift 6.2 is to isolate main actor types and conformances, establishing single-threaded main actor isolation that prevents data races while managing UI-safe execution contexts.

You need to use @concurrent for background offloading in Swift 6.2 when you want to offload tasks to background threads for parallel execution, maximizing performance while keeping the main actor isolated from data races.

To migrate an existing Swift project to Swift 6.2 concurrency safely, adopt the new concurrency model patterns by isolating types with @MainActor and selectively offloading parallel work with @concurrent to resolve implicit background offloading issues.

Swift 6.2 concurrency does not require isolating all types with @MainActor; instead, it balances single-threaded main actor isolation for safety with @concurrent for background offloading when parallel execution is needed.

Implicit background offloading causes issues in Swift 6.2 because it can lead to data races; fix it by explicitly offloading tasks to background threads using @concurrent and isolating state with @MainActor.