Tab Panel Performance Issue

[Daniil]

What the browser are you testing with? And what are the exact steps?

[ITECH-Developer]

What the browser are you testing with? And what are the exact steps?

I am using IE8 , IE9

Just open all the tabs and monitor the iexplorer process using windows task manager.

[Daniil]

I could reproduce.

It looks very similar to the problem with Ext.NET v2 and ExtJS 4.

We have an Issue regarding memory leaking in v2 with iframes.
https://github.com/extnet/Ext.NET/issues/10

Seems I have never seen such an issue with Ext.NET v1. I feel it might be related to OS. I am testing with Windows 7.

Anyway, I am afraid that the only suggestion I can do now is to avoid using iframes.