Any updates about SwiftSyntax, the swift library, in WWDC25?
Asked on 06/13/2025
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At WWDC 2025, there were updates related to SwiftSyntax, particularly in the context of improving build performance. In the session titled "What’s new in Swift," it was mentioned that the latest releases of Swift Package Manager (SwiftPM) and Xcode now support prebuilt Swift syntax dependencies. This optimization eliminates an expensive build step, significantly reducing clean build times, especially for projects using macro-based APIs. This is particularly beneficial in continuous integration environments. If you own a package that provides macros, your clients can take advantage of this optimization as long as the package depends on a tagged release of Swift syntax. You can find more details in the session What’s new in Swift (04:40).
What’s new in Swift
Join us for an update on Swift. We’ll talk about workflow improvements that make you more productive, and new and modernized library APIs for fundamental programming tasks. We’ll show examples of Swift adoption throughout more layers of the software stack. Finally, we’ll explore new language features for both improving approachability of concurrency, and achieving peak performance when you need it.
Welcome to WWDC25
There’s so much to dive into at WWDC25. Here’s a quick guide to help get you started.
Improve memory usage and performance with Swift
Discover ways to improve the performance and memory management of your Swift code. We’ll explore ways to refine your code – from making high-level algorithmic changes to adopting the new InlineArray and Span types for finer control over memory and allocations.