Summary:Initializing native modules can block the main thread for tens of milliseconds when it starts up, making it difficult to instantiate the bridge on demand without causing a performance blip.
This diff splits up the initialization of modules so that - although they still happen on the main thread - they don't block the thread continuously.
Reviewed By: javache
Differential Revision: D2965438
fb-gh-sync-id: 38c9c9d281e4672b5874d68b57d4c60d1d268344
shipit-source-id: 38c9c9d281e4672b5874d68b57d4c60d1d268344
Building the app on both iOS and Android means building the React Native framework from source. This way you're running the latest native and JS code the way you see it in your clone of the github repo.
This is different from apps created using react-native init which have a dependency on a specific version of React Native JS and native code, declared in a package.json file (and build.gradle for Android apps).