add performance testing

Author: alalag1

README.md

@@ -48,3 +48,42 @@ HttpServer.create()
  .listen(8080);
 ```
 
+## Performance
+
+### Test cases
+
+- We built a echo server by ESA HttpServer and used a http client to do the requests for RPS testing with different payload(16B, 128B, 512B, 1KB, 4KB, 10KB)
+- Also we used netty to build a same echo server which is same with above for RPS testing (use the `HttpServerCodec`, `HttpObjectAggregator` handlers directly).
+
+### Hardware Used
+
+We used the following software for the testing:
+
+- wrk4.1.0
+
+- | | OS | CPU | Mem |
+ | ------ | ------------------------ | ---- | ---- |
+ | server | centos:6.9-1.2.5(docker) | 4 | 8 |
+ | client | centos:7.6-1.3.0(docker) | 16 | 3 |
+
+ 
+
+### JVM Options
+
+```
+-server -Xms3072m -Xmx3072m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=256m -XX:+UseConcMarkSweepGC -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 -XX:+PrintTenuringDistribution -XX:+PrintGCDateStamps -XX:+PrintGCDetails -Xloggc:logs/gc-${appName}-%t.log -XX:NumberOfGCLogFiles=20 -XX:GCLogFileSize=480M -XX:+UseGCLogFileRotation -XX:HeapDumpPath=.
+```
+
+### Server Options
+
+- we set the value of IO threads to 8.
+
+### RPS
+
+| | 16B | 128B | 512B | 1KB | 4KB | 10KB |
+| -------------- | --------- | --------- | --------- | --------- | -------- | -------- |
+| Netty Origin | 133272.34 | 132818.53 | 132390.78 | 127366.28 | 85408.7 | 49798.84 |
+| ESA HttpServer | 142063.99 | 139608.23 | 139646.04 | 140159.5 | 92767.53 | 53534.21 |
+
+
+