Update README.md

README.md

@@ -9,3 +9,24 @@ YoHub
 * _Smart pointer for connections_. For most scenarios, yohub uses `shared_ptr` to automatic memory management, which is inspired from [muduo](http://code.google.com/p/muduo/). YoHub takes advantage of smart pointers which can help us take care of the life cycle of those asychronous connections, and has greatly reduced our programming burden.
 
 ### Performance
+YoHub is designed to be a high-performance network application framework, which can be used to solve the C100K problem. The benchmark pragram is token from the [libevent-1.4.14b](http://libevent.org/) distribution, modified to compatible with the event pool in yohub. Both libevent and yohub are configured to use the epoll interface and run on a Core4 Quad CPU at 2.5GHz with Ubuntu 12.04 operating system.
+
+* __100 active clients.__
+
+![100](https://raw.github.com/kedebug/kedebug.github.com/master/pic/100.png)
+
+* __1000 active clients.__
+
+![1000](https://raw.github.com/kedebug/kedebug.github.com/master/pic/1000.png)
+
+The benchmark program takes the paramter `-n` equals to `-w`, which means every client will be notified to read and wirte. The above pictures show that yohub has lower costs than libevent-1.4.14b. With the increment of the file descriptor, this tendency becomes more and more obvious.
+
+### Usage
+To use yohub, boost library is required to be installed in your machine. After that:
+```
+cmake . && make
+```
+Please see the files under `yohub/demo/` directory for further usage.
+
+### License
+[MIT](http://opensource.org/licenses/MIT)