如果你想分析或总结延迟，你可以尝试apache bench:

ab -n [number of samples] [url]

例如:

ab -n 100 http://www.google.com/

它将显示:

This is ApacheBench, Version 2.3 <$Revision: 1757674 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking www.google.com (be patient).....done


Server Software:        gws
Server Hostname:        www.google.com
Server Port:            80

Document Path:          /
Document Length:        12419 bytes

Concurrency Level:      1
Time taken for tests:   10.700 seconds
Complete requests:      100
Failed requests:        97
   (Connect: 0, Receive: 0, Length: 97, Exceptions: 0)
Total transferred:      1331107 bytes
HTML transferred:       1268293 bytes
Requests per second:    9.35 [#/sec] (mean)
Time per request:       107.004 [ms] (mean)
Time per request:       107.004 [ms] (mean, across all concurrent requests)
Transfer rate:          121.48 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       20   22   0.8     22      26
Processing:    59   85 108.7     68     911
Waiting:       59   85 108.7     67     910
Total:         80  107 108.8     90     932

Percentage of the requests served within a certain time (ms)
  50%     90
  66%     91
  75%     93
  80%     95
  90%    105
  95%    111
  98%    773
  99%    932
 100%    932 (longest request)

测量命令执行时间的通用解决方案

Linux / Mac OS / Unix

在Linux上，您可以使用time命令来测量执行一个命令所花费的时间

time curl https://en.wikipedia.org/wiki/Cat 

输出:

ect...
</body>
</html>

real    0m0.565s
user    0m0.011s
sys     0m0.024s

这里的总时间/响应时间是真实时间。

这个解决方案是通用的，应该适用于任何Unix命令

time sleep 5

输出:

real    0m5.001s
user    0m0.001s
sys 0m0.000s

视窗电源外壳

您可以使用测量命令

我做了一个友好的格式化器来嗅探curl请求，以帮助调试(参见注释了解用法)。它包含了您可以以易于阅读的格式写出的所有已知输出参数。

https://gist.github.com/manifestinteractive/ce8dec10dcb4725b8513

一个你可以添加到你的.bashrc etc的快捷方式，基于这里的其他答案:

function perf {
  curl -o /dev/null -s -w "%{time_connect} + %{time_starttransfer} = %{time_total}\n" "$1"
}

用法:

> perf stackoverflow.com
0.521 + 0.686 = 1.290

选项1:测量总时间:

curl -o /dev/null -s -w 'Total: %{time_total}s\n'  https://www.google.com

样例输出:

Total: 0.441094s

选项2:获取建立连接的时间，第一个字节的时间(TTFB)和总时间:

curl -o /dev/null -s -w 'Establish Connection: %{time_connect}s\nTTFB: %{time_starttransfer}s\nTotal: %{time_total}s\n'  https://www.google.com

样例输出:

Establish Connection: 0.020033s
TTFB: 0.417907s
Total: 0.435486s

参考:得到响应时间与卷曲

如果你想分析或总结延迟，你可以尝试apache bench:

ab -n [number of samples] [url]

例如:

ab -n 100 http://www.google.com/

它将显示:

This is ApacheBench, Version 2.3 <$Revision: 1757674 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking www.google.com (be patient).....done


Server Software:        gws
Server Hostname:        www.google.com
Server Port:            80

Document Path:          /
Document Length:        12419 bytes

Concurrency Level:      1
Time taken for tests:   10.700 seconds
Complete requests:      100
Failed requests:        97
   (Connect: 0, Receive: 0, Length: 97, Exceptions: 0)
Total transferred:      1331107 bytes
HTML transferred:       1268293 bytes
Requests per second:    9.35 [#/sec] (mean)
Time per request:       107.004 [ms] (mean)
Time per request:       107.004 [ms] (mean, across all concurrent requests)
Transfer rate:          121.48 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       20   22   0.8     22      26
Processing:    59   85 108.7     68     911
Waiting:       59   85 108.7     67     910
Total:         80  107 108.8     90     932

Percentage of the requests served within a certain time (ms)
  50%     90
  66%     91
  75%     93
  80%     95
  90%    105
  95%    111
  98%    773
  99%    932
 100%    932 (longest request)