Kotlin

on YouTube ↗23m

" summary

Instagram shifts from ~20% to 63% Kotlin lines of code and surpasses 50% in early 2023, while using Buck as the build system and R8 for release optimization. Meta builds Kosabi to generate source-only ABI jars, enabling 86% of Kotlin targets and cutting Kotlin compile time from ~20s to 10.8s (≈55%), reducing Android compile time ≈38%. Automated migration uses Kotlin Eater with JetBrains’ J2K, and adoption of the new K2 compiler further improves throughput though plugins require migration.

AI-written summary · about

" chapters (8)

1. 0:00The scale of Instagram
2. 2:06Why invest in Kotlin?
3. 3:48Benefits of Kotlin
4. 7:06Roadmap to adoption
5. 9:59Challenges with build speeds
6. 13:14Solving build performance
7. 17:55Future and automation
8. 21:28Adopting K2 and next steps

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