performance update

package.json

@@ -40,16 +40,15 @@
     "gulp-typescript": "^5.0.1",
     "gulp-uglify": "^3.0.2",
     "gulp-util": "^3.0.8",
-    "mocha": "6.2.1",
+    "mocha": "6.2.2",
     "mocha-headless-chrome": "^2.0.3",
-    "parcel-bundler": "^1.12.3",
-    "prettier": "^1.18.2",
-    "rollup": "^1.23.0",
+    "prettier": "^1.19.1",
+    "rollup": "^1.27.0",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-sourcemaps": "^0.4.2",
-    "rollup-plugin-typescript2": "^0.24.3",
-    "typescript": "^3.6.3"
+    "rollup-plugin-typescript2": "^0.25.2",
+    "typescript": "^3.7.2"
   },
   "keywords": [
     "canvas",

src/Node.ts

@@ -1675,22 +1675,44 @@ export abstract class Node<Config extends NodeConfig = NodeConfig> {
     }
   }
   _getAbsoluteTransform(top?: Node) {
-    var at = new Transform();
-
-    // start with stage and traverse downwards to self
-    this._eachAncestorReverse(function(node) {
-      var transformsEnabled = node.getTransformsEnabled();
+    
+    var at;
+    // we we need position relative to an ancestor, we will iterate for all
+    if (top) {
+      at = new Transform();
+      // start with stage and traverse downwards to self
+      this._eachAncestorReverse(function(node: Node) {
+        var transformsEnabled = node.transformsEnabled();
 
+        if (transformsEnabled === 'all') {
+          at.multiply(node.getTransform());
+        } else if (transformsEnabled === 'position') {
+          at.translate(
+            node.x() - node.offsetX(),
+            node.y() - node.offsetY()
+          );
+        }
+      }, top);
+      return at;
+    } else {
+      // try to use a cached value
+      if (this.parent) {
+        // transform will be cached
+        at = this.parent.getAbsoluteTransform().copy();
+      } else {
+        at = new Transform();
+      }
+      var transformsEnabled = this.transformsEnabled();
       if (transformsEnabled === 'all') {
-        at.multiply(node.getTransform());
+        at.multiply(this.getTransform());
       } else if (transformsEnabled === 'position') {
         at.translate(
-          node.getX() - node.getOffsetX(),
-          node.getY() - node.getOffsetY()
+          this.x() - this.offsetX(),
+          this.y() - this.offsetY()
         );
       }
-    }, top);
-    return at;
+      return at;
+    }
   }
   /**
    * get absolute scale of the node which takes into

test/performance/bunnies.html

@@ -28,7 +28,7 @@
       var maxY = height - 10;
       var minY = 0;
 
-      var startBunnyCount = 10;
+      var startBunnyCount = 1000;
       var isAdding = false;
       var count = 0;
       var container;
@@ -98,8 +98,9 @@
           bunnys.push(bunny);
           layer.add(bunny);
 
-          layer.draw();
+          
         }
+        layer.draw();
       }
 
       function onTouchStart(event) {