React Native: What is the purpose of React Native's Bridge and the New Architecture?

Old Architecture (Bridge):

• JSON-based async communication between JS and native
• Single-threaded bridge creates bottleneck
• Serialization overhead for every call

New Architecture:

• JSI: Direct JS-to-native calls (no JSON)
• Fabric: New rendering system with synchronous layout
• TurboModules: Lazy-loaded native modules
• Codegen: Type-safe JS-native interface

Benefits:

• Eliminates bridge bottleneck
• Synchronous native calls
• Lazy module loading
• Better TypeScript integration