RadAjaxManager slows down the load of a Radwindow from a user control

[Jürgen]

Hi,
In our application we got a webform with 7 tabpages  (telerik:RadTabStrip -> telerik:RadMultiPage).
For each tabpage we created a usercontrol.
On one of the tabpages is a button for opening a radwindow.
At the beginning it took 3 seconds to open this window.
After installing the RadAjaxManager on the webform and the RadAjaxManagerProxy on the usercontrol-tabpage
it slows down to 9 seconds.

Between the servside eventhandler of the button-click :

        protected void btnProductDataSelectRefMRDRNr_Click(object sender, EventArgs e)<br>        {<br>            RadWindowManager_ProductData.Windows[0].VisibleOnPageLoad = true;<br>        }

And the Page_load Event of the Radwindow :

    <telerik:RadWindowManager ID="RadWindowManager_ProductData" runat="server" <br>        Animation="FlyIn" VisibleStatusbar="False" Behavior="None" BorderStyle="None" KeepInScreenBounds="True" Skin="Telerik"><br>        <windows><br>            <telerik:RadWindow ID="RadWindowselectMRDR" runat="server" ShowContentDuringLoad="false" <br>                Width="1200px" Height="540px" Title="select MRDR" Behaviors="Close,Move" VisibleStatusbar="false"<br>                OnClientClose="OnWindowClose" Modal="True" NavigateUrl="SelectMRDR.aspx"><br>            </telerik:RadWindow><br>        </windows><br>    </telerik:RadWindowManager>

 
It slows down from 2 to 8 seconds.

Thanks for any help,
Juergen

[Pavlina]

Hello Jürgen,

The RadAjaxManager control allows you to easily create settings that update many controls on the page. Having a large number of updated controls can both help with a performance problem by rendering smaller portions of the page and worsen the situation by triggering unnecessary DOM layout updates. Dealing with such a performance problem will require actions specific for the current scenario. Refer to the following help topic which elaborates on this matter and see if it helps:
http://www.telerik.com/help/aspnet-ajax/ajxclientsideperformance.html

Additionally, to improve the performance we recommend choosing RenderSelectedPageOnly = true for RadMultiPage, set AutoPostBack = true for the tabstrip and ajaxify the tabstrip and the multipage via RadAjaxManager. Thus only the active page view will be loaded at a time.
 
Give these suggestions a try and let me know if they help in reducing the loading and rendering time of the page.

Regards,
Pavlina
the Telerik team

[Jürgen]

Dear Pavlina,
thanks for your tipps, but the problem still exists.
Now it renders only the selected tab.
But the time lag between with or without Ajaxmanager is still 5 seconds.

Any additional idea ?

kind regards,
Juergen

[Pavlina]

Hello Jürgen,

Useful tips on how to optimize the RadControls performance are available in the links below and I am sure some of them will be of great help for your project.
Optimizing output, page load time and the overall performance of RadControls for ASP.NET AJAX
Optimizing client-side performance
RadControls for ASP.NET AJAX - Top Performance

Please give them a try and let me know if the issue still persists.

Kind regards,
Pavlina
the Telerik team