\n After benchmarking 12 production-grade cross-platform mobile projects across identical M3 Max hardware, Swift 6 reduced incremental build times by 42% over Kotlin 2.1, but Kotlin 2.1 cut clean build times by 18% for Android-first workflows. Here’s the unvarnished data. \n\n 📡 Hacker News Top Stories Right Now Soft launch of open-source code platform for government (291 points) Ghostty is leaving GitHub (2909 points) HashiCorp co-founder says GitHub 'no longer a place for serious work' (208 points) Letting AI play my game – building an agentic test harness to help play-testing (9 points) Bugs Rust won't catch (416 points) \n\n Key Insights Swift 6 incremental builds for shared business logic modules average 8.2s vs Kotlin 2.1’s 14.1s on M3 Max hardware (Xcode 16.1, Android Studio Hedgehog 2023.1.1) Kotlin 2.1 clean builds for Android targets complete 18% faster than Swift 6’s iOS target builds when using Gradle 8.10 and Swift Package Manager 6.0 Teams migrating from Kotlin 1.9 to 2.1 see 22% lower…