I don't know, a ~20% improvement is not to be sneezed at in my book.
A floating window with 4 tab panels and "a few" grids is a fairly complex layout, so a 800ms rendering time sounds pretty good to me.
Can you post an example that mimics what you are doing? Ideally just an html file with script block that presents a button to display the window. Also, it would be important to accurately match where you are auto sizing in your real app because auto sizing entails extra measurements and potentially reflows.
@Sebastien - I think you're missing the point here: keep in mind that for many developers, the performance of 4.0 was completely unacceptable - not even close to usable on certain platforms - thus, it should not be taken as the baseline for comparison... While in the abstract, a 20% improvement sounds good, if the thing being improved needs an order of magnitude improvement, 20% seems almost insignificant...
Maybe Andre should make its expectations a little clearer then. What's *good*?
I skipped Ext JS 3 altogether so I have no point of comparison between 3.x and 4.0.
However, I've been working with Ext JS 2.0 for years and 4.0 since the first PR, and I never ran into any situation that makes an application usable. As far as my needs go, a 20% boost is a welcome improvement.
Granted, IE7/8 are not in my target browsers.
Did the affected applications you mention really performed so much better with Ext JS 3.x?
The kind of composition AndreKR describes in the OP sound a bit over the top to me. I'm not sure a window with tabs and several grids would perform that well even on a native widget toolkit :P
@stahlman That was exactly what I meant, thanks for typing it for me.
I put together a testcase by removing everything that requires data access while maintaining the layout complexity where possible. It's not exactly a single html file, but I got it down to 3 js-files for the different window types.
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