What stages does a Swift source file go through before it's a binary running on an iPhone?
The swiftc frontend parses and type-checks, builds SIL and optimizes it, then lowers to LLVM IR, and the LLVM backend emits arm64 object files (.o). The linker (ld) merges the objects into one Mach-O, code signing is attached, and at runtime dyld loads the dynamic libraries.
Build and distributionShort answerExpert
Your app embeds 40 dynamic frameworks. What gets better and what gets worse if you switch…
#static-library #dyld
App lifecycle and systemShort answerBasics
From the moment the app icon is tapped on the home screen until the first screen is…
#dyld
Memory and ARCShort answerAdvanced
Starting from "explain ARC," the follow-ups keep coming. First: who inserts retain and…
#compiler
Performance and debuggingShort answerAdvanced
You take over an app whose cold start takes more than 3 seconds. How would you split up…
#dyld