diff --git a/docs/guide/performance.md b/docs/guide/performance.md
index d16d962..42aa042 100644
--- a/docs/guide/performance.md
+++ b/docs/guide/performance.md
@@ -1,7 +1,7 @@
 Performance Tuning
 ==================
 
-Application performance consists of two parts. First is the framework performance
+The performance of your web application is based upon two parts. First is the framework performance
 and the second is the application itself. Yii has a pretty low performance impact
 on your application out of the box and can be fine-tuned further for production
 environment. As for the application, we'll provide some of the best practices