From 1e6128604a1bd4f2051439beacfdaf713b5461d6 Mon Sep 17 00:00:00 2001
From: Maximilian Schaum <74653168+ixam1@users.noreply.github.com>
Date: Thu, 16 Nov 2023 08:08:22 +0100
Subject: [PATCH 1/2] Prevent unnecessary rerendering of not changed clusters

---
 src/markerclusterer.ts | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/src/markerclusterer.ts b/src/markerclusterer.ts
index 6da5eb2e..a2611707 100644
--- a/src/markerclusterer.ts
+++ b/src/markerclusterer.ts
@@ -179,7 +179,8 @@ export class MarkerClusterer extends OverlayViewSafe {
       });
 
       // Allow algorithms to return flag on whether the clusters/markers have changed.
-      if (changed || changed == undefined) {
+      // But if the cluster amount hasnt changed dont rerender unnecessarily, since nothing has changed
+      if (clusters.length !== this.clusters.length && (changed || changed == undefined)) {
         // Accumulate the markers of the clusters composed of a single marker.
         // Those clusters directly use the marker.
         // Clusters with more than one markers use a group marker generated by a renderer.
@@ -207,15 +208,15 @@ export class MarkerClusterer extends OverlayViewSafe {
             // Delay the removal of old group markers to avoid flickering.
             groupMarkers.push(cluster.marker);
           }
-        }
 
-        this.clusters = clusters;
-        this.renderClusters();
+          this.clusters = clusters;
+          this.renderClusters();
 
-        // Delayed removal of the markers of the former groups.
-        requestAnimationFrame(() =>
-          groupMarkers.forEach((marker) => MarkerUtils.setMap(marker, null))
-        );
+          // Delayed removal of the markers of the former groups.
+          requestAnimationFrame(() =>
+            groupMarkers.forEach((marker) => MarkerUtils.setMap(marker, null))
+          );
+        }
       }
       google.maps.event.trigger(
         this,

From 155a7324595e03330962e68f3fcd0403f62e2570 Mon Sep 17 00:00:00 2001
From: Maximilian Schaum <74653168+ixam1@users.noreply.github.com>
Date: Thu, 16 Nov 2023 08:23:20 +0100
Subject: [PATCH 2/2] fix: prevent unnecessary rerendering

---
 src/markerclusterer.ts | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/markerclusterer.ts b/src/markerclusterer.ts
index a2611707..141a4242 100644
--- a/src/markerclusterer.ts
+++ b/src/markerclusterer.ts
@@ -208,15 +208,15 @@ export class MarkerClusterer extends OverlayViewSafe {
             // Delay the removal of old group markers to avoid flickering.
             groupMarkers.push(cluster.marker);
           }
-
-          this.clusters = clusters;
-          this.renderClusters();
-
-          // Delayed removal of the markers of the former groups.
-          requestAnimationFrame(() =>
-            groupMarkers.forEach((marker) => MarkerUtils.setMap(marker, null))
-          );
         }
+        
+        this.clusters = clusters;
+        this.renderClusters();
+
+        // Delayed removal of the markers of the former groups.
+        requestAnimationFrame(() =>
+          groupMarkers.forEach((marker) => MarkerUtils.setMap(marker, null))
+        );
       }
       google.maps.event.trigger(
         this,