diff --git a/README.md b/README.md
index ee4ca8f8..834db200 100644
--- a/README.md
+++ b/README.md
@@ -250,6 +250,7 @@
       items = [];
 
       for (i = 0; i < length; i++) {
+        // use direct assignment in this case because we're micro-optimizing.
         items[i] = '<li>' + messages[i].message + '</li>';
       }