Inside React Native's New Architecture: Fabric, TurboModule…
summary
Explains that JSI replaces bridge messaging with direct JS-to-C++ references to avoid serialization and queue delays, TurboModules use a TypeScript-driven codegen for typed, lazily initialized native APIs (moves startup cost to first use), and Fabric is a C++ renderer enabling React concurrent work, synchronous layout reads and view flattening. Migration advice: audit native deps into green/amber/red, expect six common failure patterns, watch startup, first-use, crash‑free, frame and ANR metrics, stage rollouts, and keep a rollback plan once RN ≥0.82.
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chapters (15)
- 0:00React Native’s new architecture
- 1:39Bridge limits
- 4:29How the bridge works
- 8:10Startup costs and module issues
- 10:38JSI for JS-native interaction
- 13:56JSI rules and responsibilities
- 16:08Turbo Modules
- 20:05Fabric renderer
- 23:44Fabric’s layout impact
- 25:34Migration challenges
- 27:48Interop limits and tools
- 30:00Debugging new architecture
- 31:23Migration strategy
- 32:55Five critical questions before migrating
- 34:26Key takeaways
