Total website response time
Use the following command to get a total response time, in seconds.
$ curl -s -w %{time_total}\\n -o /dev/null http://www.shellhacks.com
Sample output:
0,117
Brief options description:
| Option | Description |
| -s | Quiet mode. Don’t show progress meter or error messages |
| -w | Defines what to display on stdout after a completed and successful operation |
| -o | Write output to ‘/dev/null’ |
| time_total | The total time, in seconds, that the full operation lasted |
Detailed timing of a website response
The following command returns lookup, connect, pretransfer, starttransfer time in seconds and the total time that the full operation lasted.
$ curl -s -w ‘\nLookup time:\t%{time_namelookup}\nConnect time:\t%{time_connect}\nPreXfer time:\t%{time_pretransfer}\nStartXfer time:\t%{time_starttransfer}\n\nTotal time:\t%{time_total}\n’ -o /dev/null http://www.shellhacks.com
Sample output:
Lookup time: 0,004Connect time: 0,022PreXfer time: 0,022StartXfer time: 0,068 Total time: 0,125
Brief options description:
| Option | Description |
| Lookup time (time_namelookup) | The time, in seconds, it took from the start until the name resolving was completed |
| Connect time (time_connect) | The time, in seconds, it took from the start until the TCP connect to the remote host was completed |
| PreXfer time (time_pretransfer) | The time, in seconds, it took from the start until the file transfer was just about to begin. This includes all ‘pre-transfer’ commands and negotiations that are specific to the particular protocol(s) involved |
| StartXfer time (time_starttransfer) | The time, in seconds, it took from the start until the first byte was just about to be transferred. This includes ‘time_pretransfer’ and also the time the server needed to calculate the result |
More detailed timing of a website response
The following command adds appconnect and redirect time in seconds, to the previous report. These options are available in a latest versions of CURL.
curl -s -w ‘\nLookup time:\t%{time_namelookup}\nConnect time:\t%{time_connect}\nAppCon time:\t%{time_appconnect}\nRedirect time:\t%{time_redirect}\nPreXfer time:\t%{time_pretransfer}\nStartXfer time:\t%{time_starttransfer}\n\nTotal time:\t%{time_total}\n’ -o /dev/null http://www.shellhacks.com
Sample output:
Lookup time: 0,003Connect time: 0,020AppCon time: 0,000Redirect time: 0,000PreXfer time: 0,020StartXfer time: 0,963 Total time: 1,001