The effects of Kotlin inside Android apps and libraries

on YouTube ↗40m

" summary

Analysis of the Google I/O scheduling app (300 Kotlin files, 176 JARs → 16 DEX) shows concrete effects: Kotlin stdlib ~1.4MB, coroutines ~1.5MB; enabling minify with ProGuard shrinks text-bytes by 73% and APK size by 55%; removing Kotlin null checks and intrinsics saves ~32KB; ProGuard and DexGuard handle Kotlin metadata and can rename hard-coded names, while R8 lags on some string renames; an open-source Kotlin metadata printer exposes the protobuffer metadata so obfuscation keeps runtime compatibility.

AI-written summary · about

" chapters (9)

1. 0:00Introduction to Kotlin impact
2. 1:38Kotlin runtime libraries overview
3. 4:10Kotlin constructs in bytecode
4. 8:49Optimizing with ProGuard
5. 12:47Kotlin-specific optimizations
6. 17:23Kotlin metadata structure
7. 23:20Metadata files and reflection
8. 27:35Optimization tips and resources
9. 31:14Conclusion and Q&A intro

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