diff --git a/src/brushes/spray_brush.class.js b/src/brushes/spray_brush.class.js
index 5512712a..aac186d2 100644
--- a/src/brushes/spray_brush.class.js
+++ b/src/brushes/spray_brush.class.js
@@ -37,7 +37,14 @@ fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric
    * @type Boolean
    * @default
    */
-  randomOpacity:      false,
+  randomOpacity:        false,
+
+  /**
+   * Whether overlapping dots (rectangles) should be removed (for performance reasons)
+   * @type Boolean
+   * @default
+   */
+  optimizeOverlapping:  true,
 
   /**
    * Constructor
@@ -97,6 +104,11 @@ fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric
         rects.push(rect);
       }
     }
+
+    if (this.optimizeOverlapping) {
+      rects = this._getOptimizedRects(rects);
+    }
+
     var group = new fabric.Group(rects);
     this.canvas.add(group);
     this.canvas.fire('path:created', { path: group });
@@ -107,6 +119,25 @@ fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric
     this.canvas.renderAll();
   },
 
+  _getOptimizedRects: function(rects) {
+
+    // avoid creating duplicate rects at the same coordinates
+    var uniqueRects = { }, key;
+
+    for (var i = 0, len = rects.length; i < len; i++) {
+      key = rects[i].left + '' + rects[i].top;
+      if (!uniqueRects[key]) {
+        uniqueRects[key] = rects[i];
+      }
+    }
+    var uniqueRectsArray = [ ];
+    for (key in uniqueRects) {
+      uniqueRectsArray.push(uniqueRects[key]);
+    }
+
+    return uniqueRectsArray;
+  },
+
   /**
    * Renders brush
    */