github地址：https://github.com/wg/wrk
一、安裝
Mac
```
$ brew install wrk
```
Ubuntu/Debian
```
sudo apt-get update
sudo apt-get install build-essential libssl-dev git -y
git clone https://github.com/wg/wrk.git wrk
cd wrk
sudo make
#move the executable to somewhere in your PATH, ex:
sudo cp wrk /usr/local/bin
```
CentOS / RedHat / Fedora
```
sudo yum groupinstall'Development Tools'
sudo yum install openssl-devel
sudo yum install gitgit clone https://github.com/wg/wrk.git wrk
cd wrk
make
#move the executable to somewhere in your PATH
sudo cp wrk /somewhere/in/your/PATH
```
其他系統參考：https://github.com/wg/wrk/wiki
二、使用
wrk的使用非常簡單
一行命令搞定
wrk -t12 -c400 -d30s http://127.0.0.1:8080/index.html
運行30s，開啟12線程，總共保持400個HTTP連接開啟
三、wrk報告
Running 30s test @ http://127.0.0.1:8080/index.html
12 threads and 400 connections
Thread Stats? Avg? ? ? Stdev? ? Max? +/- Stdev
Latency? 635.91us? ? 0.89ms? 12.92ms? 93.69%?
Req/Sec? ? 56.20k? ? 8.07k? 62.00k? ? 86.54%
22464657 requests in 30.00s, 17.76GB read
Requests/sec: 748868.53
Transfer/sec:? ? 606.33MB
結果也不難理解。
latency那一行反映了請求響應時間，分別為平均值，標準差，最大值，正負一個標準差內的比例；
transfer為數據交換量。
其他都很好理解，無須解釋了。
