When I use customized marker, the system starts to get heavy after a few processes. But if I use it without customization, there is no problem. I share a screenshot of my Marker's code, why I may have encountered such a problem.
So it's okay if I use the default marker. But if I designed it myself it works very slowly.
Number of Markers: 50
Library: react-native-maps, react-native-vector-icons/FontAwesome5