Embedded Swift Improvements Coming in Swift 6.4

Swift.orgPublished 2026-10-09 14:58 UTC

Embedded Swift is a subset of Swift that’s designed for low resource usage, making it capable of running on constrained environments like microcontrollers. Using a special compilation mode, Embedded Swift produces significantly smaller binaries than regular Swift. While a subset of the full language, the vast majority of the Swift language works exactly the same in Embedded Swift. Additional…

— Swift.org

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Release

Version: 6.4
Released: 2026-08-20
Release notes: Swift.org

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