How do I measure request and response times at once using cURL?

From this brilliant blog post... 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>). For our purposes we’ll focus just on the timing details that are provided. Times below are in seconds.

1. Create a new file, curl-format.txt, and paste in:

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

2. Make a request:

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

Or on Windows, it's...

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

What this does:

-w "@curl-format.txt" tells cURL to use our format file
-o /dev/null redirects the output of the request to /dev/null
-stells cURL not to show a progress meter
"http://wordpress.com/" isthe URL we are requesting. Use quotes particularly if your URL has "&" query string parameters

And here is what you get back:

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

Make a Linux/Mac shortcut (alias)

alias curltime="curl -w \"@$HOME/.curl-format.txt\" -o /dev/null -s "

Then you can simply call...

curltime wordpress.org

Thanks to commenter Pete Doyle!

Make a Linux/Mac stand-alone script

This script does not require a separate .txt file to contain the formatting.

Create a new file, curltime, somewhere in your executable path, and paste in:

#!/bin/bashcurl -w @- -o /dev/null -s "$@" <<'EOF'    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}\nEOF

Call the same way as the alias:

curltime wordpress.org

Make a Windows shortcut (aka BAT file)

Put this command in CURLTIME.BAT (in the same folder as curl.exe)

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

Then you can simply call...

curltime wordpress.org

Here is the answer:

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.

Option 1. To measure total time:

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

Sample output:

Option 2. To get time to establish connection, time to first byte (TTFB) and 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:

Ref: Get response time with curl