Have you seen the OpenSUSE article in the recent c't magazine http://www.heise.de/ct/inhalt/2009/26/6/ ?
There is a paragraph about KOffice, and Krita in particular. I thought you might be interested, although it's unfortunately rather negative.

Licht und Schatten
Etwas enttäuschend war allein das KDE-Büropaket Koffice. Die erst vor kurzem auf KDE 4 portierte Bürosuite zeigte sich in unseren Tests recht absturzfreudig. Am hakeligsten gestaltete sich die Arbeit mit der Bildbearbeitung Krita. Das Programm stürzte nicht nur regelmäßig ab, sondern brachte mit Effektpinseln gezeichnete Linien nur mit spürbarer Verzögerung auf den Bildschirm. Während der Wartezeit war das Programm unbenutzbar, sodass man sich nie sicher war, ob es nicht doch wieder eingefroren war.

My rough translation:

Lights and shades
A bit disappointing was alone the KDE office suite Koffice. The office suite, that was only recently ported to KDE 4, presented itself quite crash-laden in our tests. Roughest was the work with the image editing Krita. The program not only crashed regularly, but also displayed lines drawn with effect brushes only after a noticeable delay. During the waiting times, the program is unusable, so you couldn't be sure if it didn't freeze again.

I already wrote them a mail asking for information about the crashes. Unfortunately we couldn't reproduce the crashes they experienced yet. It could be a problem with Krita on a 64-bit system, but we don't know for sure at the moment.

Yeah, I just had the time to catch up with the "last week in krita" reports and found that this is indeed very old news. Tried to delete the thread, but it's apparently not possible. Feel free to delete it, though. Thanks for your answer.

I'm on a 64 bit system and I haven't had anywhere near that level of bugs. Still, they obviously didn't read that 2.1 was an "early adopter release".

Still, with the amount of progress that's already happened in Trunk, and with Lukas' upcoming sprint, I'm confident 2.2 will make them eat their words.

I'm wondering whether they might have tried to run Krita in a vm instead of on a real machine -- in any vm, Krita is really slow, and I don't really know why. If I try to run Krita in an opensuse vmware instance on my mac, drawing lines is impossible.

Perhaps because of missing OpenGL support?

boudewijn wrote:I'm wondering whether they might have tried to run Krita in a vm instead of on a real machine -- in any vm, Krita is really slow, and I don't really know why. If I try to run Krita in an opensuse vmware instance on my mac, drawing lines is impossible.

Maybe this has something with raster engine in Qt. We use it strictly for canvas and I read somewhere that Raster engine and vnc does not like each other from the performance point of view. See this blog post http://zrusin.blogspot.com/2009/08/2d-in-kde.html

It may relate, but maybe I totally wrong. I'm just trying to add suggestion.

It's not suprising that the filter paintop can be slow with some paintops even if it's not running in a vm. They didn't mention running it in a vm when I asked for their system and I think they wouldn't write about performance if it's running in one.

The crashes should not depend on running it in a vm, I think.