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I have strange performance issue after upgrading prof-uis while my code is almost identical (confirmed by downgrading to older vesion again).

My app has 2 views divided by horizontal splitter. Upper view is tree grid, bottom is tab control containing dialog which contains some ext combo boxes. When I start my app, everything works correctly. But when I focus any combo box, moving of the app window over the screen is much slower (it drops to maybe 1 FPS) especially when piece of title bar is cut by top of the screen.

CPU usage seems to be very low in contrast of normal situation when moving is more smooth but CPU usage is above 90%. It looks like some lazy redrawing (or only invalidating?) of the app window.

Do you have idea what could be wrong? How to find the reason?

Thank you.

We successfully reproduced the problem and are working on it. It occurs only on Windows XP, only on slow machines and only in 10% of attempts reproducing it. This debugging and analysis are very hard. We are even not 100% sure if this is a Prof-UIS issue at all.

Do you have any news on this? I can imagine it’s hard to debug this. I have this issue in 100% attempts. I have AMD sempron 3400+ notebook. But when I use prof-uis 2.82 it works normal (haven’t tried 2.83), there must be some bug in new version, it looks unlikely to be bug in windows, unless you are using some other API which is buggy.

Which Windows version, which Prof-UIS sample application and which Prof-UIS theme should we use for reproducing this issue?

I’ve made test application. Just select office theme, select some item from combo box and try to move app window over screen (esp. keep half of title bar out of screen).

http://rrrado.szm.sk/treetest.rar

Windows XP, only Office 2007 themes. Other themes works good. Unfortunately currently I don’t have time to search and try the samples, I’ll try next week if you don’t have idea.