docs: update

source/new-image-handler/test/bench/README.md

@@ -1,10 +1,19 @@
 # Benchmark test
 
-## curl.sh make http requests to urls in parallel
+## curl.sh: make http requests to urls in parallel
 
 ```
 # edit urls.txt
 
 $ ./curl.sh urls.txt
 $ N=10 ./curl.sh urls.txt  # make 10 http requests simultaneously
+```
+
+## vegeta: http load test tools
+
+install https://github.com/tsenart/vegeta firstly
+
+```
+# edit vegeta-urls.txt
+cat vegeta-urls.txt | vegeta attack -duration=1m -rate=300  -timeout=300s -format=http | vegeta report
 ```

source/new-image-handler/test/bench/vegeta-urls.txt

@@ -0,0 +1 @@
+GET http://<HOST>/example.jpg?x-oss-process=image/resize,s_300/quality,q_80/auto-orient,0/interlace,1/format,jpg