Merge pull request JustFly1984#890 from csirkeee/fix/performant-rendering

Re-render icons on end of clustering cycle.

Author: JustFly1984

packages/react-google-maps-api-marker-clusterer/src/Cluster.tsx

@@ -141,8 +141,6 @@ export class Cluster {
       marker.setMap(null)
     }
 
-    this.updateIcon()
-
     return true
   }
 

packages/react-google-maps-api-marker-clusterer/src/Clusterer.tsx

@@ -709,7 +709,11 @@ export class Clusterer {
        * @param {Clusterer} mc The Clusterer whose markers are being clustered.
        * @event
        */
-      google.maps.event.trigger(this, 'clusteringend', this)
+      google.maps.event.trigger(this, 'clusteringend', this) 
+
+      for (let i = 0; i < this.clusters.length; i++) {
+        this.clusters[i].updateIcon()
+      }
     }
   }