How to measure response time using curl?

Command:

curl -kv -w '\n* Response time: %{time_total}s\n' <IP_OR_URL>

Example:

curl -kv -w '\n* Response time: %{time_total}s\n' https://google.com

Definition of time_total according to the docs:

The total time in seconds, that the full operation lasted. The time will be displayed with millisecond resolution.

References:

• https://everything.curl.dev/usingcurl/verbose/writeout#available-write-out-variables
• https://curl.se/docs/manpage.html#-k
• https://curl.se/docs/manpage.html#-v
• https://curl.se/docs/manpage.html#-w