diff --git a/benchmark/benchmark.js b/benchmark/benchmark.js
index c08705a..1d88861 100644
--- a/benchmark/benchmark.js
+++ b/benchmark/benchmark.js
@@ -214,8 +214,8 @@
       HTMLTemplateElement.decorate(this.template);
       if (this.expressions)
         this.template.bindingDelegate = new PolymerExpressions;
-
-      this.template.content.appendChild(this.fragment.cloneNode(true));
+      var clone = this.fragment.cloneNode(true);
+      this.template.content.appendChild(clone);
       this.template.setAttribute('repeat', '');
     },
 
@@ -225,8 +225,10 @@
     },
 
     teardownMDVVariant: function() {
-      this.template.bindings.iterator.close();
+      if (this.template.bindings)
+        this.template.bindings.iterator.close();
       this.template = undefined;
+      testDiv.innerHTML = '';
     },
 
     setupHandlebarsVariant: function() {
diff --git a/benchmark/index.html b/benchmark/index.html
index e20dc09..1893c3f 100644
--- a/benchmark/index.html
+++ b/benchmark/index.html
@@ -65,7 +65,7 @@ <h1>Template instantiation benchmarks</h1>
 </select>
 <br>
 <span>Binding Density (%): </span>
-<input id="bindingDensityInput" style="width: 200px" value="0, 1, 2, 4, 8, 16, 32, 64, 100"><br>
+<input id="bindingDensityInput" style="width: 200px" value="0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100"><br>
 
 MDV: <input id="mdvCheckbox" type="checkbox" checked>
 Handlebars: <input id="handlebarsCheckbox" type="checkbox" checked>