Application with sliding panels is jerking (animation performance problems)

[sraubal]

Hi,

we are currently experiencing performance problems with the slide FX functionality:
When we ware sliding panels/containers with large content (like a big tree and lots of form elements) our reference system (IE 6 on Win XP SP2 with 512MB RAM and a single-core P4) doesn't render smoothly - it is jerking in a ugly way during the slide effect.
We even tried using our own native JavaScript code to modify the position of the containers but even that doesn't work as smooth as an ExtGwt-less prototype does.

Does anybody have a solution to this problem?

Are there any events that are automatically triggered even when we directly set the style.left property of a container element?

Thanks in advance for any suggestions or tipps!

Regards,
Stefan

[sraubal]

Hi,

though nobody seems to have a similar problem here, I'll share some interesting results anyways:


TEXTAREA elements slow down the sliding noticeable.
Scroll bars slow it down, too, but not as significant.
The jerking can be reduced on IE by having an element on the page that has a CSS style/rule with any of IE's proprietary filters (that's truly amazing - but it renders smoother (though not faster) in such a situation).
Maybe someday someone benefits from these points...

Regards,
Stefan