Question

I need to count the rendering time of an UpdatePanel inside my page.
Someone knows how to do that?

Thanks in Advance.

Answer 1

You could subscribe for the beginRequest and endRequest callbacks and calculate the elapsed time between them.

function pageLoad() {
    var manager = Sys.WebForms.PageRequestManager.getInstance();
    if (manager != null) {
        manager.add_beginRequest(Request_Begin);
        manager.add_endRequest(Request_End);
    }
}

function Request_Begin(sender, args)
{
    // TODO: start your timer here (new Date())
}

function Request_End(sender, args) {
    // TODO: get the current date and measure the difference
    // with theone obtained in the beginRequest
}

The following thread will help you in implementing the TODOs I left in my code.