update readme

@@ -27,7 +27,7 @@ for internet. SRS is simple for and only for problem domain is simplified.
 
 SRS is a simple, [RTMP](https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_DeliveryRTMP)/
 [HLS](https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_DeliveryHLS), 
-[high-performance(6k+ single process/thread)](https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_Performance), 
+[high-performance(6k+ clients)](https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_Performance), 
 single/multiple(plan) processes, edge/origin live server, 
 [x86/x64/arm](https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_SrsLinuxArm), 
 compile depends on [st](http://sourceforge.net/projects/state-threads)(required),