You notice a few seconds delay in the map load times.
If you do have a large number of locations on your map, the locations (map pins) that are piled up together may cause a delay in load times on the map.
It is best to enable Clustering in your map settings to allow the locations on your map to be clearly laid out. This avoids the map pins being piled up together. This should help the load times on your map. The guide on how the Map Clustering can be enabled is found here.