Dev Tools · 1h ago
Synchronous TurboModules Can Block React Native Performance
React Native's synchronous TurboModules may appear fast but can block the JavaScript thread during native operations like keychain access or decryption. A single call may be harmless, but repeated calls degrade UI responsiveness. Developers should measure native method latency and prefer async patterns when operations are not instant.
Meridian48 take
The article correctly warns that synchronous APIs in React Native's new architecture can mislead developers into assuming zero cost, but the real issue is insufficient profiling of native method latency.
react-nativeperformance