update

Author: xiaoc

README.md

@@ -19,5 +19,8 @@ require('module-unique').init();
 
 
 memory used about 30% above in my own project!
+#### before using module-unique 
 ![http://gtms03.alicdn.com/tps/i3/TB1nU9QGFXXXXb4XFXXDeGnJXXX-886-144.png](http://gtms03.alicdn.com/tps/i3/TB1nU9QGFXXXXb4XFXXDeGnJXXX-886-144.png)
+
+#### after using module-unique
 ![http://gtms02.alicdn.com/tps/i2/TB1OBmVGFXXXXaZXXXXhN4IGpXX-930-98.png](http://gtms02.alicdn.com/tps/i2/TB1OBmVGFXXXXaZXXXXhN4IGpXX-930-98.png)