How to get loading time?

[Christian LeMoussel]

Does exist some method/propery to measure the loading time of HTML page?

If the loading time is too long, is it possible to stop the loading of the HTML page?

Best regards,

Christian.

[Alex Maitland]

Not that I've seen. You can probably just hook one of the loading event handlers, using a timer and call Stop() if the timer executes.

[Christian LeMoussel]

Alex,

or another way is to use task object for StartNew method and then user Wait method to determine timeout.
eg :

using System;
using System.Threading;
using System.Threading.Tasks;

namespace TaskTimeOut
{  
    class Program
    {
        static void Main(string[] args)
        {
            TimeSpan timeout = TimeSpan.FromMilliseconds(5000);

            Task timeOutTask = Task.Factory.StartNew(() =>
            {
                try
                {
                    // Simulate the long running computation
                    Thread.Sleep(10000);
                }
                catch (Exception ex) { Console.WriteLine(ex.Message); }
            }, TaskCreationOptions.LongRunning);
            //  With TaskCreationOptions.LongRunning option, it will have a dedicated Thread for it's execution and does not interfere with normal behavior of ThreadPool by occupying a thread from there for too long.
           
            if (!timeOutTask.Wait(timeout))
            {
                // throw exception or something else if timeout
                Console.WriteLine("Time Out");
                Console.ReadKey();
            }

        }
    }
}

Best regards,

Christian.

[Bill Tutt]

Err, shouldn't you be able to get the info from Dev Tools just like in Chrome?

Particularly the Network/Timeline/Profiler tabs?

Bill

[Christian LeMoussel]

Well, well,

But I use OffScreen browser.
Is it possible to get informations from Dev Tools with C# code ?

[Alex Maitland]

You have to use `ChromeDriver` to access such things. Unsure exactly how much network info is exposed.

https://bitbucket.org/chromiumembedded/cef/wiki/UsingChromeDriver.md
http://stackoverflow.com/a/22502405/4583726

Let us know what you find out.

[Christian LeMoussel]

Alex,

Without use of another technology or ChromeDriver, and as described in this presentation Performance Metrics in a Day with Selenium for gathering metrics 2 methods :

Method 1: Own Timings

Date start = new Date();
// Some stuff ....,
// Get HTML Page
Date end = new Date();

But I think It's a naive attempt to measure the time it takes to fully load a page.

Method 2 : Web Timings
Use W3C API navigation timing
In this case if I understand the specifications in chapter 5.1 Processing Model and in slide 9 of the presentation
Page loading time would equal to : loadEventEnd - navigationStart

It's this method that I will try to integrate with JavaScript  in CefSharp.


Christian.