I am using Navigator from react-native for screen transitions. In my one component, I am using ListView. By clicking on a particular item, I am calling an API using XMLHttpRequest and on API result I am pushing using my navigator object to another screen and also passing API response data as passProps with the route. In the componentDidMount method of another screen, I am calling another API. My problem is when I am creating a signed android APK and running on a physical device then transition between such screens is extremely slow. My current RN version is 0.41.2. On iOS with the same behavior, the signed app is running quite smooth on physical devices.

Please let me know, what wrong I have done.