Is it possible to retreive the MS / Latency from a "GET" request? (Javascript / Jquery)

Question

I am at the moment making some getjson requests with jquery.

They are get requests: "GET http://localhost/MySite/JSON"

Now you can watch the requests fire in firebug. Then they return a "200 OK 250ms". I would like to be able to display something similar on my page itself. So the user can see the latency for themselves. Image found via google from http://testnscale.com

Is it possible to retreive the MS / Latency from a "GET" request?

Answer 1

Just try it and check if those values you're measuring are the same or close to it.

Like

var startTime;
$.ajax({
    // .. url, type, dataType, etc
    beforeSend: function(xhr){
        startTime = +new Date();
    }
    complete: function(xhr, state){
        var latency = (+new Date()) - startTime
    }
});

I'm actually curious about that, so let us know your results. what you are getting is the difference in miliseconds.