O React Native executa código JavaScript e código nativo que precisam se comunicar. A arquitetura original usava um bridge assíncrono; a nova arquitetura (JSI, TurboModules, Fabric) permite comunicação mais rápida e síncrona. Compreender isso esclarece o comportamento e a performance do React Native.
A arquitetura original: o bridge
React Native runs:
→ a JS THREAD (your React/JS code) and the NATIVE side (UI, native modules)
→ they communicate over a BRIDGE: messages are SERIALIZED (to JSON), passed ASYNC,
and deserialized on the other side
Limitations:
✗ ASYNCHRONOUS only (can't call native synchronously)
✗ SERIALIZATION overhead; the bridge can be a BOTTLENECK with heavy traffic
✗ e.g. fast scrolling/animations passing data over the bridge → jank
