Answered: Combo with remote store problem~
I got a form with about 20 Combo with remote store,
and each set the first value of the store,
it makes the form render very slowly,
how can deal with this?
I tested with 4.0.2 a
Posted by stevil
Layout performance is a known problem in current releases of Ext JS 4.0.x. I'm not convinced it's a remote store issue - I think it's the layout in general.
My application has a lot of these as well, and it takes a while to render them, the more comboboxes, the longer it takes, ESPECIALLY in IE8!