Page generation time - ASP.Net MVC

Question

I\'m looking for a way to track how long it took for a page to be generated by the server. I know I can use Trace to track this but I need a way to display this per page.

Answer 1

You can implement it like a ActionFilterAttribute

[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
public class LoggingAttribute : ActionFilterAttribute
{
    private readonly Stopwatch _sw;

    public LoggingAttribute()
    {
        _sw = new Stopwatch();
    }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        _sw.Start();
        Debug.WriteLine("Beginning executing: " + GetControllerAndActionName(filterContext.ActionDescriptor));
    }

    public override void OnActionExecuted(ActionExecutedContext filterContext)
    {
        _sw.Stop();
        var ms = _sw.ElapsedMilliseconds;

        Debug.WriteLine("Finishing executing: " + GetControllerAndActionName(filterContext.ActionDescriptor));
        Debug.WriteLine("Time elapsed: "+ TimeSpan.FromMilliseconds(ms).TotalSeconds);
    }

    private string GetControllerAndActionName(ActionDescriptor actionDescriptor)
    {
        return actionDescriptor.ControllerDescriptor.ControllerName + " - " + actionDescriptor.ActionName;
    }
}

Decorate every controller or action-method with it and voila, it spit outs the text in debug.

EDIT: If you want to print it on the page you could add this snippet to the OnActionExecuted method

if(filterContext.Result is ViewResult) { //Make sure the request is a ViewResult, ie. a page
  ((ViewResult) filterContext.Result).ViewData["ExecutionTime"] = ms; //Set the viewdata dictionary
}

Now you have the executiontime saved in ViewData and can access it in the page.. I usually put it in the masterpage like this