Looking at around 3 weeks before beta (but don't quote me on that - software is hard)
any news for the 4.1 release?
I'm currently using 4.0.7 and I can confirm that the tab switching time is still very slow if the tab content is complex. It doesn't matter which browser is used. I tried it with FF8, IE9, Chrome 15...
I tried it with the portal example and put that content in one tab. The content of the other tabs were only simple html content. The switiching time to or away from the "portal-tab" is very slow. The switching time between the simple html tabs is fast. This confirms what you said above.
It is almost December now... When can we expect the 4.1 release? Please...
Not sure exactly why it happens or how much of a difference it makes, but the thing I noticed right away with your examples was that nearly every tab click on the 4.1 tabs resulted in two extra image requests:
GET /dev/lib/extjs-4.1.0/resources/themes/images/default/tab/tab-default-top-active-corners.gif HTTP/1.1
GET /dev/lib/extjs-4.1.0/resources/themes/images/default/tab/tab-default-top-active-sides.gif HTTP/1.1
These didn't occur with the 3.4 examples. They resulted in 304, but are still extra HTTP requests.. could they make the tabs seem less responsive I wonder?