[Panel-devel] Caching support integrated into 4.4

[Andreas Aardal Hanssen]

On Friday 07 September 2007 17:22, Aaron J. Seigo wrote:
> On Friday 07 September 2007, Andreas Aardal Hanssen wrote:
> > An option might be also to provide a patch for qt-copy for KDE 4.0, the
> > change can be backported very painlessly (although of course it can't go
> > into Qt 4.3 upstream).
>
> if such a patch were made available, i'd be happy to test it here against
> 4.3 and then get it into qt-copy ...

It's in the snapshots that'll be released in 2 hours or so, but in the mean 
time here's a patch that applies cleanly to 4.3; this patch follows standard 
open source Qt licensing so feel free to use it as you like :-).

I've done measurements of my own - compiled up kde4 with Qt 4.4 (didn't work 
right away because of build error in Qt/XML). Moving analogclock around 
without caching on my machine uses 40% CPU. With caching there's no visual 
impact, but CPU usage drops to 2-4% :-))). Of course, the clock doesn't 
change ;-). Right now it needs to call invalidate() but I think I'll make 
update() work like it should instead. :-)

-- 
Andreas Aardal Hanssen / bibr
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