RadTreeView Expand Taking a Long Time

[not]

I have a RadTreeView in my user control (.ascx) like this:

<telerik:RadTreeView ID="myTreeView" CheckBoxes="true"  

PersistLoadOnDemandNodes="true" TriStateCheckBoxes="true" runat="server"

CheckChildNodes="true" CausesValidation="false"

OnNodeExpand="treeView_NodeExpand">

    <CollapseAnimation Type="OutQuint" Duration="100" />

    <ExpandAnimation Duration="100" />  

</telerik:RadTreeView><BR>

It's been working fine but lately I notice when I click on the expand(+) button it take about more than 5 seconds to hit the break point I have on the 1st line of code in my handler(treeView_NodeExpand). What could be the culprit here? What is going on in between the click and hitting the break point?

[not]

Update:

This is what I get from Fiddler -

ACTUAL PERFORMANCE
--------------
ClientConnected: 08:47:16.736
ClientBeginRequest: 08:47:25.517
ClientDoneRequest: 08:47:25.524
Gateway Determination: 0ms
DNS Lookup:   0ms
TCP/IP Connect:  0ms
HTTPS Handshake: 0ms
ServerConnected: 08:45:39.387
FiddlerBeginRequest: 08:47:25.524
ServerGotRequest: 08:47:25.525
ServerBeginResponse: 08:48:13.028
ServerDoneResponse: 08:48:13.028
ClientBeginResponse: 08:48:13.028
ClientDoneResponse: 08:48:13.028

Overall Elapsed: 00:00:47.5110000

It takes a 47 seconds to expand a tree node! However, this behavior is not consistent, sometimes it's snappy sometimes it takes forever. This happens on my local development machine which is running Windows 7 Enterprise. I'm using VS 2008.

Thanks.

[Nikolay Tsenkov]

Hi not,

Could you, please, open a support ticket and send us a sample project reproducing this slowdown?
Or could you, please, post some code that will reproduce it, along with an algorithm so we can reproduce it at our end?


Regards,
Nikolay Tsenkov
the Telerik team