curl测试网页响应时间

连接时间：

curl -s -o /dev/null -w "%{time_connect}\n" http://www.joinpay.com

传输时间：

curl -s -o /dev/null -w "%{time_starttransfer}\n" http://www.joinpay.com

总时间：
curl -s -o /dev/null -w "%{time_total}\n" http://www.joinpay.com

curl对网站响应时间监控：
[root@localhost script]# curl -o /dev/null -s -w "time_connect: %{time_connect}\ntime_starttransfer: %{time_starttransfer}\ntime_total: %{time_total}\n" "https://www.joinpay.com"
time_connect: 0.015
time_starttransfer: 0.394
time_total: 0.433