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IE8 performance issue

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pirobox
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pirobox asked on 16 Jul 2010, 02:07 PM
Hi,
I'm doing some tests with the 2010Q2 version of the DataGrid.
In a test I'm trying to bind a DataGrid to a dataset with 2000 rows (4 columns) without paging (Ok, it's an extreme scenario).
The rendering of the page is quite fast, but when I try to select a row in IE8, the browser occupies almost all the cpu and sometimes it warns me that a script is blocking the window.
The same thing doesn't happen with other browsers like chrome.

Here is the code of the grid (just to let you know which parameters I've set)

<rad:RadGrid runat="server" AutoGenerateColumns="true" ID="Grid1" AllowSorting="true"
AllowPaging="true" PageSize="20" AllowMultiRowSelection="true">
<MasterTableView TableLayout="Fixed">
</MasterTableView>
<PagerStyle Mode="NextPrevNumericAndAdvanced" Position="Top" />
<ClientSettings Selecting-AllowRowSelect="true" Selecting-EnableDragToSelectRows="false">
</ClientSettings>
</rad:RadGrid>

Have you experienced this issue? Do you know if there is any way to fix it, or you already plan to fix it in a future release.

Best regards, Andrea Pirola

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Dimo
Telerik team
answered on 19 Jul 2010, 06:54 AM
Hello Andrea,

The item selection functionality involves some DOM operations. Internet Explorer is notoriously slower with these, compared to other browsers, and the problem becomes more visible when the number of DOM elements on the page is huge. We have already optimized the client-side code with regard to client selection, so please, consider reducing the number of rendered RadGrid items.

Greetings,
Dimo
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