Performance issue in react-navigation

[goyalshubham614]

There is a delay in navigation focus and transition end events. The screen focus event is listened, then the page is stuck, no state changes are also reflected for around 1.5-2sec. After that the transitionEnd event is listened. Does this mean that the page rendering is slow or the react-navigation is slow as I added a loader in the current screen but it is not getting rendered/painted on screen as the navigation is in progress in my opinion.