Too Long; Didn't Read
Facebook's Hermes engine is optimized for running React Native apps on Android only. It is now available on iOS as well as the latest React Native 0.64 release. Callstack has published a series of articles explaining how to bring Hermes to iOS. The articles include a technical guide and benchmarks to show how to use the engine on iOS. For more information, please visit the Facebook Engineers blog: http://www.callstack.com/hermes-native-engine-reporter/Hermes-iOS/.