src/main/java/speiger/src/data/Registry.java

@@ -52,6 +52,7 @@ public class Registry {
 	Map<UUID, Collectable> collectables = new LinkedHashMap<>();
 	Set<UUID> completed = new HashSet<>();
 	Object syncObj = new Object();
+	boolean bulkOperationActive = false;
 	
 	public void load() {
 		parseRegistry("/assets/data/medals.json", CollectableType.MEDAL);
@@ -202,14 +203,22 @@ public class Registry {
 	
 	public void markComplete(UUID id) {
 		completed.add(id);
-		save();
+		if (bulkOperationActive) save();
 	}
 	
 	public void unmarkComplete(UUID id) {
 		completed.remove(id);
-		save();
+		if (bulkOperationActive) save();
 	}
 	
+	public void setBulkOperation(boolean bulk) {
+		bulkOperationActive = bulk;
+
+		if (!bulk) {
+			save();
+		}
+	}
+
 	public boolean isCompleted(UUID id) {
 		return completed.contains(id);
 	}

src/main/java/speiger/src/ui/MapPanel.java

@@ -345,7 +345,9 @@ public class MapPanel extends JPanel {
 	}
 	
 	public void setCompletionState(boolean value) {
+		Registry.INSTANCE.setBulkOperation(true);
 		visibleMarkers.forEach(T -> T.setCompletion(value));
+		Registry.INSTANCE.setBulkOperation(false);
 	}
 	
 	@Override