diff --git a/README.md b/README.md
index 775418b..b3f09c4 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 [![Build Status](https://travis-ci.org/yanyiwu/cppjieba.png?branch=master)](https://travis-ci.org/yanyiwu/cppjieba) 
 [![Author](https://img.shields.io/badge/author-@yanyiwu-blue.svg?style=flat)](http://yanyiwu.com/) 
+[![Performance](https://img.shields.io/badge/performance-excellent-brightgreen.svg?style=flat)](http://yanyiwu.com/work/2015/06/14/jieba-series-performance-test.html) 
 [![License](https://img.shields.io/badge/license-MIT-yellow.svg?style=flat)](http://yanyiwu.mit-license.org)
 
 ## 简介
diff --git a/README_EN.md b/README_EN.md
index 04fcee5..cb25395 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -2,6 +2,7 @@
 
 [![Build Status](https://travis-ci.org/yanyiwu/cppjieba.png?branch=master)](https://travis-ci.org/yanyiwu/cppjieba) 
 [![Author](https://img.shields.io/badge/author-@yanyiwu-blue.svg?style=flat)](http://yanyiwu.com/) 
+[![Performance](https://img.shields.io/badge/performance-excellent-brightgreen.svg?style=flat)](http://yanyiwu.com/work/2015/06/14/jieba-series-performance-test.html) 
 [![License](https://img.shields.io/badge/license-MIT-yellow.svg?style=flat)](http://yanyiwu.mit-license.org)
 
 ## Introduction