RadScheduler is very slow in IE

[H.]

I have a web part that load user control with the RadScheduler and take a lot time to load the page. Does somebody has any idea why the page take too long?

I did everything in the following documents

http://www.telerik.com/community/forums/aspnet-ajax/scheduler/radscheduler-performance-improvement.aspx

http://www.telerik.com/help/aspnet-ajax/introduction-optimizing-output-page-load-time-using-radscriptmanager-radstylesheetmanager.html

 http://www.flowmarks.com/2010/02/radcontrols-performance-tips.html

Also, I change the Compilation debug to false and Scriptmanger to Scriptmode=release.

TIME
Get Data and RadScheduler.DataBind time : 700 - 800 Milliseconds

Time to load page
IE 10-11 secs. 

Chrome 5 secs

I have expended three days in do everything is in the web.
Regards
HANK

[Shinu]

Hello Hank,

Check the following forum thread which discussed similar scenario.
radScheduler performance: IE vs FF

-Shinu.

[H.]

Thx Shinu, How can I change  the hover css ? is there a css that I need to update? 

[Peter]

Hi H.,

To remove the hover style, please use the following css:

.rsAptCreate
   {
       background:none !important;
       }

Regards,
Peter
the Telerik team

[H.]

Thx Peter. I am going to try this !!

[H.]

Thanks Peter. I tried this css but still take 12 second to show 52 appointments. Get data takes 700 to 800 milliseconds. The rest of the time is only render teh calendar.

Note: The RAdScheduler is inside a User control and the user control inside a Web part.

** This is the content of the css file.**

.rsAptCreate
   {
       background:none !important;
   }
 
 div.RadScheduler .rsHeader
 {
      z-index: 200 !Important;
 }
    
    div.RadScheduler .rsHorizontalHeaderTable,
    div.RadScheduler .rsContentTable
    {
        width /*\**/: 100%\9 !important;
    }
    *+html div.RadScheduler .rsHorizontalHeaderTable,
    *+html div.RadScheduler .rsContentTable
    {
        width: auto !important;
    }

[Peter]

Hello,

Older versions of IE such as 6, 7 and even 8, are indeed slow and there isn't much you can do to improve performance for such browsers. Have you tested your page with IE9, Chrome or Firefox? Do you get satisfactory performance with those browsers?

Kind regards,
Peter
the Telerik team

[Nitin]

Peter, I hear some of the Telerik controls don't work all that well with lower IE versions. Do we have a telerik document detailing what works best with what browser, that might be a helpful tool in designing the application.

[Boyan Dimitrov]

Hello,

Could you please explain what exactly does not work that well in previous version of IE.
Officially we support IE6 and above versions. 

Regards,
Boyan Dimitrov
the Telerik team

[Nitin]

I am not a .net/ SP developer, but looking at one of the deliverable from an other company that has delivered. So I will not be able to tell you the technicalities. What i can tell you is user experience. The same application works fine in current versions of FF. but on IE8 (officially supported browser), the RadScheduler is a pain in every possible way on IE8. 

• The scheduler load time on IE8 is infinite and on FF i can atleast look at the watch and say it is around 60-120 sec, depending on the data
• On IE8, screen freezes randomly.
• The scroll don't work
• PopUp Edit takes eternity to load
• Drag n Drop happen but freezes randomly

The fact is I do not want to compromise performance for a few fancy features, If I can get most of the features by building a JS based scheduler and that works good on IE and better on FF.  

I need to know if there are any known issues / limitations, performance concerns that we need to be aware of?

Regards,
Nitin

[Boyan Dimitrov]

Hello,

Could you please try to test our RadScheduler online demos under IE8 and confirm that you are facing the described issues with our examples as well. This will help us to find out what might cause such unusual behavior.


Regards,
Boyan Dimitrov
the Telerik team

[Nitin]

Boyan, thank you very much for taking time to show me the demo. Though i like the soft appearance of the scheduler, here are a few issues i found

- 16 sec to load initial page with IE8, 2/3 with chrome/FF.
- on IE, i kept getting there was an error processing the request, nothing on FF/Chrome.
- while in a month's view, on IE, when i used drag and drop, the appointments kept accumulating one over the other without the more button for a good 2-3 seconds after which it showed more, on FF/Chrome, it right away showed more... if there were more than 2 appointments on a day

Curiosity Questions, is it hardcoded data or from a local source?


~Nitin

[Boyan Dimitrov]

Hello,

I would like to confirm that your first two observations are absolutely correct and this is limitation of the older versions of IE.
The RadScheduler is complex control and the those versions of IE renders the generated HTML slowly and some delay can be noticed.

Could you please elaborate a bit more on your last note - could you please provide the exact steps of reproducing that appointment drag and drop issue?

Regards,
Boyan Dimitrov
the Telerik team