1. The Fabric Renderer & C++ JSI Revolution
With the Bridgeless New Architecture enabled, JavaScript directly invokes native C++ methods via JSI (JavaScript Interface) pointers. Layout calculations happen synchronously through Yoga in C++, eliminating the dreaded white flash when scrolling rapidly through lists.
2. TurboModules for Low-Latency Hardware Interop
We migrated our client Bluetooth telemetry and cryptography pipelines from old NativeModules to TurboModules. Memory footprint decreased by 34% because modules are loaded lazily on demand rather than all at application boot.
- Audit third-party dependencies with `react-native-community/bob` before migrating.
- Take advantage of synchronous state updates to prevent input jump glitches in forms.
- Profile with Hermes memory profiler to identify orphaned closure references.