如何使用cURL一次测量请求和响应时间？

本文翻译自：How do I measure request and response times at once using cURL?

I have a web service that receives data in JSON format, processes the data, and then returns the result to the requester. 我有一个Web服务，它接收JSON格式的数据，处理数据，然后将结果返回给请求者。

I want to measure the request, response, and total time using cURL . 我想使用cURL测量请求，响应和总时间。

My example request looks like: 我的示例请求如下：

curl -X POST -d @file server:port

and I currently measure this using the time command in Linux: 我目前使用Linux中的time命令测量它：

time curl -X POST -d @file server:port

The time command only measures total time, though - which isn't quite what I am looking for. 时间命令只测量总时间 - 这不是我想要的。

Is there any way to measure request and response times using cURL ? 有没有办法使用cURL来衡量请求和响应时间？

#1楼

参考：https://stackoom.com/question/1EQeb/如何使用cURL一次测量请求和响应时间

#2楼

Here is the answer: 这是答案：

curl -X POST -d @file server:port -w %{time_connect}:%{time_starttransfer}:%{time_total}

All of the variables used with -w can be found in man curl . 与-w一起使用的所有变量都可以在man curl找到。

#3楼

From this brilliant blog post... https://blog.josephscott.org/2011/10/14/timing-details-with-curl/ 从这篇精彩的博客文章... https://blog.josephscott.org/2011/10/14/timing-details-with-curl/

cURL supports formatted output for the details of the request (see the cURL manpage for details , under -w, –write-out <format> ). cURL支持格式化输出以获取请求的详细信息（有关详细信息，请参阅cURL联机帮助页，在-w, –write-out <format> ）。 For our purposes we'll focus just on the timing details that are provided. 出于我们的目的，我们将仅关注所提供的时序细节。

Create a new file, curl-format.txt, and paste in: 创建一个新文件curl-format.txt并粘贴到：

  time_namelookup: %{time_namelookup}\\n time_connect: %{time_connect}\\n time_appconnect: %{time_appconnect}\\n time_pretransfer: %{time_pretransfer}\\n time_redirect: %{time_redirect}\\n time_starttransfer: %{time_starttransfer}\\n ----------\\n time_total: %{time_total}\\n

Make a request: 发出请求：

 curl -w "@curl-format.txt" -o /dev/null -s "http://wordpress.com/"

Or on Windows, it's... 或者在Windows上，它是......

 curl -w "@curl-format.txt" -o NUL -s "http://wordpress.com/"

What this does: 这是做什么的：

-w "@curl-format.txt" tells cURL to use our format file -w "@curl-format.txt"告诉cURL使用我们的格式文件
-o /dev/null redirects the output of the request to /dev/null -o /dev/null将请求的输出重定向到/ dev / null
-s tells cURL not to show a progress meter -s告诉cURL不要显示进度表
"http://wordpress.com/" is the URL we are requesting. "http://wordpress.com/"是我们要求的网址。 Use quotes particularly if your URL has "&" query string parameters 如果您的URL具有“＆”查询字符串参数，请使用引号

And here is what you get back: 这是你得到的回报：

   time_namelookup:  0.001time_connect:  0.037time_appconnect:  0.000time_pretransfer:  0.037time_redirect:  0.000
time_starttransfer:  0.092----------time_total:  0.164

Make a Windows shortcut (aka BAT file) 创建Windows快捷方式（也称为BAT文件）

Put this command in CURLTIME.BAT (in the same folder as curl.exe) 将此命令放在CURLTIME.BAT中（与curl.exe位于同一文件夹中）

curl -w "@%~dp0curl-format.txt" -o NUL -s %*

Then you can simply call... 然后你可以简单地打电话......

curltime wordpress.org

#4楼

Option 1. To measure total time : 选项1.测量total time ：

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

Sample output: 样本输出：

Option 2. To get time to establish connection , TTFB: time to first byte and total time : 选项2.为了有time to establish connection ， TTFB: time to first byte total time和total time ：

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

Sample output: 样本输出：

Ref: Get response time with curl 参考：获得卷曲的响应时间

#5楼

A shortcut you can add to your .bashrc etc, based on other answers here: 您可以根据此处的其他答案添加到.bashrc等的快捷方式：

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

Usage: 用法：

> perf stackoverflow.com
0.521 + 0.686 = 1.290

#6楼

I made a friendly formatter for sniffing curl requests to help with debugging ( see comments for usage ). 我做了一个友好的格式化程序来嗅探curl请求以帮助调试（参见使用注释）。 It contains's every known output parameter you can write out in an easy to read format. 它包含您可以用易于阅读的格式写出的每个已知输出参数。

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