[CLOSED] Combobox makes page with large image really slow

[jchau]

I have a simple page with a toolbar and a combobox. Underneath the toolbar is a huge image (3mb). The combobox makes the page super slow after it renders. Scrolling is slow, clicking on the combobox is slow, everything is slow. If I replace the combobox with a dropdownlist, everything is fast again.

    <form id="form1" runat="server">
    <ext:ScriptManager ID="ScriptManager1" runat="server">
    </ext:ScriptManager>
    <ext:Toolbar ID="Toolbar1" runat="server">
        <Items>
        <ext:ComboBox runat="server" ID="cb" >
        <Items>
        <ext:ListItem Text="Test" Value="Test" />
        </Items>
        </ext:ComboBox>
        </Items>
    </ext:Toolbar>
    <ext:Image runat="server" ID="img" ImageUrl="anybigimage">
    </ext:Image>
    </form>

[Vladimir]

Hi,

Unfortunately, I can't reproduce it. I use 8 Mb BMP picture but under IE6/IE8, FF, Chrome works all fine without any delays.
Can you provide more details? Does it depend from computer (i mean if computer is faster then delay decreases)? Under what browsers it is reproduces? May be you can specify more conditions to reproduce it

[jchau]

I am using IE8 on my dev machine (WinXP, 2gig ram, p4 3.60GHz). When the page renders, the scrolling is ok. But as soon as I click on the trigger field in the combobox, everything slows down. I will try to get a public page out for you to see.

[jchau]

Sent you guys an email yesterday with a sample page you can look at. Let me know if there's anything else you need. Thanks!

[jchau]

Please let me know if you were able to reproduce this issue using the link I sent via email. I want to make sure it's not my computer.

[geoffrey.mcgill]

Hi Jacky,

We were not able to reproduce the issue. Both Vladimir and I tested your code separately and it appeared to work as expected.

[jchau]

Thank you for the followup. Did you try the link I emailed using IE8? I am able to reproduce it now on multiple testing machines.

[geoffrey.mcgill]

Hi Jacky,

I've tried the link and I re-recreated the sample locally, but unfortunately was unable to reproduce the problem.

[geoffrey.mcgill]

Hi Jacky,

Do you have any updates on this issue?