Performance drop after maximising a transparent window

Has anyone else noticed a massive performance hit after maximising a transparent window. This seems to continue even after the window is restored to normal.

The same app using a non-transparent window has no problems.

I am using the June CTP.

[261 byte] By [stuntpope] at [2007-12-23]
# 1

Using window transparency (AllowsTransparency = true) forces WPF to render and/or compose its content differently. See here: http://blogs.msdn.com/seema/archive/2006/10/25/layered-windows-sw-is-sometimes-faster-than-hw.aspx

When you say the window is restored to normal, do you mean normal transparency, or normal (non-maximized) size? Also, what OS are you using?

Thanks,

David

DavidTeitlebaumMSFT at 2007-8-30 > top of Msdn Tech,Visual Studio Orcas,Windows Presentation Foundation (WPF)...
# 2
From what I understand, using transparent window under Windows XP can cause most of the window to be software rendered, where, under Vista, it would be hardware rendered,
Bytemaster at 2007-8-30 > top of Msdn Tech,Visual Studio Orcas,Windows Presentation Foundation (WPF)...
# 3

Thanks for the response David.

It's been a while since I posted so I'll have to go back and check this again but what I meant was that the slow-down remained even once the window was reduced back to non-maximised size. I am using Windows XP with service pack 2.

stuntpope at 2007-8-30 > top of Msdn Tech,Visual Studio Orcas,Windows Presentation Foundation (WPF)...

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