Just watch IE8's Profiler while working with a grid tied to a buffered store (perhaps a grid that's larger than the little widget in the examples - try one that takes 1/2 the screen)... a LOT of my lag time is spent in onHeaderResize in IE8
i wanted to buy license today, but i am not feeling too good about the product change while reading this thread,
I would expect a serious involvement of Sencha team - most of our customers are IE and i cannot have them being impacted to that extent
@evant The issue isn't IE vs other browsers, it's ExtJS 4 vs Extjs 3.3 on IE (8 or 9). There appears to have been a significant performance degradation in ExtJS 4.
So far, in the 1 week that this bug rpt has been open, there has been no real response from Sencha. I'm getting concerned, but trying to be patient...
Originally Posted by evant
No, unless you've explicitly set useDom to be true.
I don't really notice much difference when loading the examples. Obviously IE is slower than Chrome/FF because it's an inferior browser, but I'm not seeing anything like the 30 second load times you've mentioned. Seems like other users (above) haven't been able to either.
@rich02818 Although I would say all browsers have some issues. Even in Chrome, a buffered store grid panel in a center region of a full screen layout takes 1.5 seconds on a core i7-840 between the time the store loads, mask disappears, and the scrollbar appears. If I turn off forceFit, and/or don't try to flex the columns, it's relatively OK. I'm sorry, the scrollbar should just BE there.