Temporary fix for performance problems in Firefox (dragging nodes still...

Temporary fix for performance problems in Firefox (dragging nodes still creates memory leaks, but it does not automatically crash now).

display/graph.js

@@ -35,6 +35,8 @@ export default class Graph {
         this.idToNode = {};
 
         this.firstTick = true;
+        this.engineFrozen = false;
+        this.allowRedraw = false;
         this.infoOverlay = null;
 
         this.edgeTypeVisibility = {};
@@ -70,9 +72,13 @@ export default class Graph {
             .onLinkHover((link, previousLink) =>
                 this.onLinkHover(link, previousLink)
             )
+            .onNodeDrag(() => {
+                this.allowRedraw = true;
+            })
             .onNodeDragEnd((node, translate) =>
                 this.onNodeDragEnd(node, translate)
             )
+            .onEngineStop(() => this.simulationStop())
             //.linkColor((link) => this.getLinkColor(link))
             .linkPositionUpdate((line, { start, end }) =>
                 this.updateLinkPosition(line, start, end)
@@ -84,6 +90,8 @@ export default class Graph {
             .onEngineTick(() => this.initializeModel())
             .width(Helpers.getWidth())
             .height(Helpers.getHeight());
+
+        setTimeout(() => this.simulationStop(), 3000);
     }
 
     /**
@@ -222,6 +230,7 @@ export default class Graph {
         ) {
             this.onNodeClick(node);
         }
+        this.allowRedraw = false;
     }
 
     focusOnNode(node) {
@@ -450,7 +459,28 @@ export default class Graph {
         return line;
     }
 
+    simulationStop() {
+        this.engineFrozen = true;
+        this.stopPhysics();
+    }
+
+    stopPhysics() {
+        const data = this.graph.graphData();
+        data["nodes"].forEach((n) => {
+            n.fx = n.x;
+            n.fy = n.y;
+            n.fz = n.z;
+        });
+        this.graph.graphData(data);
+    }
+
     updateLinkPosition(line, start, end) {
+        if (!this.allowRedraw) {
+            if (this.engineFrozen) {
+                return true;
+            }
+        }
+
         if (!(line instanceof Line2)) {
             return false;
         }
@@ -472,8 +502,8 @@ export default class Graph {
             .flat();
 
         line.geometry.setPositions(positions);
-        //line.geometry.getAttribute("position").needsUpdate = true;
-        //line.computeLineDistances();
+        // line.geometry.getAttribute("position").needsUpdate = true;
+        // line.computeLineDistances();
 
         return true;
     }