preformance issues with oxygen style and window decoration

[Alexander Neundorf]

On Friday 06 February 2009, Tobias Koenig wrote:
> Hej,
>
> when using a KDE 4.2 desktop with Qt 4.4 or 4.5 RC it feels
> really slow on not up-to-date hardware. The problem is not the
> hardware as KDE 3.5 works fine and also not Qt (what my first suspicion
> was). In fact it is the oxygen style _and_ oxygen window decoration.
...
> IMHO computers with 500MHz-1GHz are still quite common (especially in
> offices), so we shouldn't support only the highend computers if we want a
> broad adoption of KDE 4.

It's not only old computers, it's also brand new devices, like netbooks or 
even smaller mobile devices like e.g. the Nokia N810.
So I think we really should care about this.

At FOSDEM I talked with Ade and he said that there are some things in 
plasma/style/window decorations which make KDE4 via remote X, e.g. on thin 
clients, more or less unusable. The issue is gradients and the alpha channel, 
which are not (not widely or not at all ?) supported via remote X.

Alex