[by tprodigy1]

To me, 4.2 still doesn't perform well at all under IE8, especially tab panel rendering time and tab switching, also nested panels rendering is still way slower than extjs 3.4. the only componend...

[by tprodigy1]

for sure, 4.0.2, is an improvement concerning performance. (lots of bugs are fixed too)

BUT : the overall behavior, is still slower than 3.3

for example (in the context of a real application,...

[by tprodigy1]

[QUOTE=tvanzoelen;608672]If you do something like this, it is fixed.
[/CODE]

true, this way it is immediate.... hope this will help sencha to fix the problem

[by tprodigy1]

I added "layout : 'fit' " in every nested panel of the first example code in this thread and it doesn't change anything sorry. it take between 3 to 5 seconds to show / hide the controls (under Win XP...

[by tprodigy1]

mitchell, sorry but are you all blind at sencha? have you tried this simple example :
...

[by tprodigy1]

+1 of course, but the subject is being discussed here:

http://www.sencha.com/forum/showthread.php?133134-VERY-SLOW-behavior-of-fields-in-nested-panels-%28compared-to-extjs-3%29

[by tprodigy1]

ok, I modified the allowBlank property (but did you test it yourself?)... and guess what? it is as much slow as before... the problem is not about "allowBlank" property.

[by tprodigy1]

please! no need to ask for code examples to prove how much slow is extjs4 compared to 3

IT IS SLOW ! IT IS A FACT, everyone who uses extjs in real applications can confirm that.

[by tprodigy1]

Just pray for sencha to fix this issue in the next release

[by tprodigy1]

when a grid panel using Ext.ux.ProgressBarPager tries to display an empty store, you get the message : 'Warning, size detected as NaN on Element.addUnits.' (IE even stops the execution)

to...

[by tprodigy1]

in my example, for sure it seems "overnested", but extjs is designed like this, and in a real application, if you just setup a form panel, containing a tab panel, in wich you want to put dynamic and...

[by tprodigy1]

here is an exemple to show how SLOW can behave extjs 4 (the same type of code is IMMEDIATE in extjs3)

in the code below, I create 4 comboboxes that I put in multiple nested panels (7 levels of...