What is the most important new feature in Swift 6?

Generated on 8/5/2024

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The most important new feature in Swift 6 is the introduction of the Swift 6 language mode, which provides data race safety guarantees. This feature helps developers write correct concurrent programs by diagnosing concurrent access to memory at compile time. This new language mode is opt-in, allowing developers to adopt it incrementally, module by module, without needing to wait for dependencies to migrate.

For more details, you can refer to the session What’s new in Swift (26:24).