How to Test Website response time in Linux Terminal?
Website response time can have a greater impact on the user side. The web developer Os a server administrator is responsible to optimize the website so that the users don’t feel frustrated while accessing the website. In this tutorial, we are going to discuss how to test a website response from the command line.
You can view the output of website performance using the “curl” command which is the powerful tool to transfer data from or to a server. curl can be used as a command line downloader in most cases. curl command has a useful option “-w” for printing information after an operation. You can use the below command to view the “website response time”.
# curl -s -w ‘Testing Website Response Time for :%{url_effective}\n\nLookup Time:\t\t%{time_namelookup}\nConnect Time:\t\t%{time_connect}\nPre-transfer Time:\t%{time_pretransfer}\nStart-transfer Time:\t%{time_starttransfer}\n\nTotal Time:\t\t%{time_total}\n’ -o /dev/null website url
Example:
root@server [/]# curl -s -w ‘Testing Website Response Time for :%{url_effective}\n\nLookup Time:\t\t%{time_namelookup}\nConnect Time:\t\t%{time_connect}\nPre-transfer Time:\t%{time_pretransfer}\nStart-transfer Time:\t%{time_starttransfer}\n\nTotal Time:\t\t%{time_total}\n’ -o /dev/null http://www.google.com
Testing Website Response Time for :http://www.google.com/
Lookup Time: 0.018
Connect Time: 0.019
Pre-transfer Time: 0.019
Start-transfer Time: 0.056
Total Time: 0.056
curl -s -w ‘Testing Website Response Time for :%{url_effective}\n\nLookup Time:\t\t%{time_namelookup}\nConnect Time:\t\t%{time_connect}\nPre-transfer Time:\t%{time_pretransfer}\nStart-transfer Time:\t%{time_starttransfer}\n\nTotal Time:\t\t%{time_total}\n’ -o /dev/null http://tellisports.com/
Testing Website Response Time for :http://tellisports.com/
Lookup Time: 0.031
Connect Time: 0.031
Pre-transfer Time: 0.031
Start-transfer Time: 0.077
Total Time: 0.088
For https you can run the below command.
# curl -s -w ‘Testing Website Response Time for :%{url_effective}\n\nLookup Time:\t\t%{time_namelookup}\nConnect Time:\t\t%{time_connect}\nAppCon Time:\t\t%{time_appconnect}\nRedirect Time:\t\t%{time_redirect}\nPre-transfer Time:\t%{time_pretransfer}\nStart-transfer Time:\t%{time_starttransfer}\n\nTotal Time:\t\t%{time_total}\n’ -o /dev/null https://www.google.com
Lookup Time: 0.018
Connect Time: 0.019
AppCon Time: 0.374
Redirect Time: 0.000
Pre-transfer Time: 0.374
Start-transfer Time: 0.392
Total Time: 0.392
Lookup time: (time_namelookup): Time in seconds, it took from the start until the name resolving was completed.
Connect time: (time_connect ): Time in seconds, it took from the start until the TCP connect to the remote host was completed.
PreXfer time: (time_pretransfer): Time, in seconds, it took from the start until the file transfer was just about to begin.
StartXfer time: (time_starttransfer): Time, in seconds, it took from the start until the first byte was just about to be transferred.
time_appconnect: (AppCon Time): Time, in seconds, it took from the start until the SSL connect/handshake to the remote host was completed.
time_redirect: (Redirect time): Time, in seconds, it took for all redirection steps including name lookup, connect and transfer before the final transaction was started. It provides the full execution time for multiple redirections.
time_total: Total time, in seconds, that the full operation lasted.
Command Options:
-s: Describes the curl to work silently.
-w: Print the information to stdout.
-o: used to redirect output.
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