Swift 6.2 brings easier concurrency, improved safety, WebAssembly support, and more

Apple has released Swift 6.2, introducing updates that focus on concurrent programming, performance, and improved developer tooling. This version makes concurrent programming more accessible by defaulting to single-threaded operation and offering intuitive asynchronous functions, allowing developers to write safe concurrent code with less boilerplate. In parallel, Swift 6.2 maximizes performance without sacrificing safety, enabling low-level code with predictable execution and minimal overhead.

Following these language improvements, the official Swift extension for Visual Studio Code has been verified and is now distributed by Swift.org. To assist teams with upgrades, new migration tooling helps projects adopt forthcoming language features. The developer experience is further enhanced with noticeably faster clean build times, particularly for projects using macro-based APIs. Developers benefit from improved debugging of concurrent code in LLDB and new options for managing compiler warnings at the diagnostic group level.

Building on ecosystem improvements, Swift 6.2 library updates include a new Subprocess package, enhancements to the Foundation library, and new APIs intended to support safer coding patterns. Finally, Swift 6.2 also adds WebAssembly support, allowing both client and server Swift applications to target Wasm and deploy to browsers or other compatible environments.