Some additional data points. Within same IE instance (different tab). Here are the reload times:
Also, changing the 'theme' via the dropdown is dramatically different. Under 3.3.3 it's almost instantaneous but under 4.0.0 it takes as long as a complete reload.
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 have the same problem on Theme samples, using IE8 (no addons).
Changing the theme from the default one to the accesibility one:
Using the IE8 profiler you can clearly see the methods that take a really long time while using v4.
Changing themes in ExtJS4 actually loads a different html page (index-access.html), hence a complete reload. This does not occur with ExtJS3 so this particular comparison is apples to oranges...
Originally Posted by VT-TizianoF
IE9 has similar performance issues as IE8: Within same IE instance (different tab). Here are the reload times for IE9:
Is this being tracked
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
Where do we go..?
We are also struggling with the performance of the Sencha 4 Grid in IE. With more than 250 rows it becomes unusable.
We implemented Buffered Grid which made the performance acceptable but then the selection didn’t work per the thread below:
Anyone have and workarounds?
Thanks in advance.
This is seriously bad news...
@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
@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.