Simple Linux tool for timing an http request in milliseconds
Does this do what you're looking for?
time wget http://example.com
Httping will do that.
Httping is like 'ping' but for http-requests. Give it an url, and it'll show you how long it takes to connect, send a request and retrieve the reply (only the headers). Be aware that the transmission across the network also takes time! So it measures the latency of the webserver + network.