diff --git a/src/lib/base.html b/src/lib/base.html
index 42d54ae7d9..d98f19bd6b 100644
--- a/src/lib/base.html
+++ b/src/lib/base.html
@@ -46,7 +46,7 @@
         }
       } else {
         this._desugarBehaviors(); // abstract
-        // previously factor behavior call unrolled for perf
+        // this code was in a function but is unrolled here for perf
         for (var i=0, b; i < this.behaviors.length; i++) {
           b = this.behaviors[i];
           if (b.beforeRegister) {
@@ -69,7 +69,7 @@
       }
       Polymer.telemetry.instanceCount++;
       this.root = this;
-      // previously factor behavior call unrolled for perf
+      // this code was in a function but is unrolled here for perf
       for (var i=0, b; i < this.behaviors.length; i++) {
         b = this.behaviors[i];
         if (b.created) {
@@ -99,7 +99,7 @@
         // IFF `lazyRegister` is 'max'
         if (settings.lazyRegister === 'max') {
           proto._desugarBehaviors(); // abstract
-          // previously factor behavior call unrolled for perf
+          // this code was in a function but is unrolled here for perf
           for (var i=0, b; i < proto.behaviors.length; i++) {
             b = proto.behaviors[i];
             if (b.beforeRegister) {
@@ -112,7 +112,7 @@
           proto._finishRegisterFeatures();
         }
         // registration extension point
-        // previously factor behavior call unrolled for perf
+        // this code was in a function but is unrolled here for perf
         for (var j=0, pb; j < proto.behaviors.length; j++) {
           pb = proto.behaviors[j];
           if (pb.registered) {
@@ -139,7 +139,7 @@
       var self = this;
       Polymer.RenderStatus.whenReady(function() {
         self.isAttached = true;
-        // previously factor behavior call unrolled for perf
+        // this code was in a function but is unrolled here for perf
         for (var i=0, b; i < self.behaviors.length; i++) {
           b = self.behaviors[i];
           if (b.attached) {
@@ -158,7 +158,7 @@
       var self = this;
       Polymer.RenderStatus.whenReady(function() {
         self.isAttached = false;
-        // previously factor behavior call unrolled for perf
+        // this code was in a function but is unrolled here for perf
         for (var i=0, b; i < self.behaviors.length; i++) {
           b = self.behaviors[i];
           if (b.detached) {
@@ -176,7 +176,7 @@
       // TODO(sorvell): consider filtering out changes to host attributes
       // note: this was barely measurable with 3 host attributes.
       this._attributeChangedImpl(name); // abstract
-      // previously factor behavior call unrolled for perf
+      // this code was in a function but is unrolled here for perf
       for (var i=0, b; i < this.behaviors.length; i++) {
         b = this.behaviors[i];
         if (b.attributeChanged) {
diff --git a/src/mini/ready.html b/src/mini/ready.html
index c55b301547..38c6586a3d 100644
--- a/src/mini/ready.html
+++ b/src/mini/ready.html
@@ -137,6 +137,7 @@
     // note: called localChildren -> host
     _readySelf: function() {
       // ready
+      // this code was in a function but is unrolled here for perf
       for (var i=0, b; i < this.behaviors.length; i++) {
         b = this.behaviors[i];
         if (b.ready) {