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The Swift logo with the text Swift 6.4 The Swift logo with the text Swift 6.4 Swift 6.4 Released Swift 6.4 is now available. Swift aims to be a great choice across the stack, from apps and servers to systems code, embedded devices, and the browser. This release deepens that support, and makes everyday code easier to write. Highlights include: Read more

  • Developer Tools

    Module Tracking in Swift Debug Info

    When your Swift program hits a breakpoint and stops so you can inspect it, the debugger’s expression evaluator has to find the exact Swift module your code was built from. Until now, that lookup wasn’t always precise. The upcoming Swift 6.4 release will include changes, begun in Swift 6.3, that address this by updating how the Swift compiler references explicitly-built Swift modules in debug info.

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  • Digest

    What's new in Swift: September 2026 Edition

    Welcome to “What’s new in Swift,” a curated digest of releases, videos, and discussions in the Swift project and community.

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  • Adopters

    Swift at Apple: Migrating the TrueType Hinting Interpreter

    TrueType is a widely used vector font standard for rendering text in web pages, PDFs, operating systems, and applications. Familiar fonts like Helvetica, Garamond, and Monaco are all built on TrueType outlines. The format specifies a hinting interpreter intended to help outlines rasterize faithfully on low-resolution displays. Modern high-resolution displays enable beautiful typography from outlines alone, but TrueType fonts that need hinting to render legibly remain in use and we continue to support them. Font parsers process data from untrusted sources, making the TrueType hinting interpreter a security-critical attack surface. To make the format more resilient on Apple platforms, we rewrote its hinting interpreter from C to memory-safe Swift for the Fall 2025 releases. In addition to memory safety, we also improved performance: on average, our Swift interpreter runs 13% faster than the C interpreter it replaced. To accompany this post, we’ve also published the source code of the Swift TrueType hinting interpreter. We hope sharing our experience helps others doing similar work in Swift.

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  • Community

    GSoC 2026 Showcase

    The Swift project once again participated in Google Summer of Code in 2026, pairing newcomers to open source with mentors to build new features for Swift and its ecosystem.

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