update readme

README.md

@@ -485,7 +485,7 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 
 ## History
-* v2.0, 2014-12-04, enable [#241](https://github.com/winlinvip/simple-rtmp-server/issues/241) and [#248](https://github.com/winlinvip/simple-rtmp-server/issues/248), improve about 25% performance. 2.0.50
+* v2.0, 2014-12-04, enable [#241](https://github.com/winlinvip/simple-rtmp-server/issues/241) and [#248](https://github.com/winlinvip/simple-rtmp-server/issues/248), +25% performance, 2.5k publisher. 2.0.50
 * v2.0, 2014-12-04, fix [#248](https://github.com/winlinvip/simple-rtmp-server/issues/248), improve about 15% performance for fast buffer. 2.0.49
 * v2.0, 2014-12-03, fix [#244](https://github.com/winlinvip/simple-rtmp-server/issues/244), conn thread use cond to wait for recv thread error. 2.0.47.
 * v2.0, 2014-12-02, merge [#239](https://github.com/winlinvip/simple-rtmp-server/pull/239), traverse the token before response connect. 2.0.45.