命令:
curl -w "@curl-format.txt" -o /dev/null -s -L "https://www.jd.com"
格式:
# cat curl-format.txt
time_namelookup: %{time_namelookup}\n
time_connect: %{time_connect}\n
time_appconnect: %{time_appconnect}\n
time_redirect: %{time_redirect}\n
time_pretransfer: %{time_pretransfer}\n
time_starttransfer: %{time_starttransfer}\n
----------\n
time_total: %{time_total}\n
-
time_namelookup: DNS解析时间
-
time_connect:TCP 连接建立的时间,就是三次握手的时间
-
time_appconnect:SSL/SSH 等上层协议建立连接的时间,比如 connect/handshake 的时间
-
time_redirect: 从开始到最后一个请求事务的时间
-
time_pretransfer:从请求开始到响应开始传输的时间
-
time_starttransfer: 从请求开始到第一个字节将要传输的时间
-
time_total:这次请求花费的全部时间
示例:
# curl -w "@curl-format.txt" -o /dev/null -s -L "https://www.jd.com"
time_namelookup: 0.529108
time_connect: 0.688685
time_appconnect: 1.201098
time_redirect: 0.000000
time_pretransfer: 1.201304
time_starttransfer: 1.418342
----------
time_total: 1.540865
-
DNS查询时间:0529108
-
TCP连接时间: time_connect - time_namelookup = 0.688685 - 0.529108 = 159ms
-
服务器处理时间:time_starttransfer - time_pretransfer = 1.418342 - 1.201304 = 217ms
-
内容传输时间:time_total - time_starttransfer = 1.540865 - 1.418342 = 122ms
命令行指定格式
# curl -w "%{time_namelookup}\n%{time_connect}\n%{time_pretransfer}\n%{time_starttransfer}\n%{time_total}" -o /dev/null -s -L "https://www.jd.com"
0.014314
0.018578
0.044222
0.293051
0.701479