Performance issue with complex QGraphicsScene

[Nicuvëo]

Caching the more expensive drawing items in a pixmap. For this to work I had to increase the pixmap cachesize in the main routine.

I tried that already; the problem is that I have lots of small items instead of a few expensive ones.

Caching the background drawing.

Already tried, also... but my background is currently nothing more than a pixmap, so nothing gained here either. ^^

Disable indexing because I have many moving items.

My items aren't moving (yet), but I'll remember that tip when I try to introduce such features.

Scaling down the number of samples used for anti-aliasing.

Aaah, this one is useful.
It does indeed give a bit of a boost to the rendering speed, without looking as ugly as no anti-aliasing at all.

These tricks give some advantage but I am still looking for better tricks to have a satisfactory result...

It is a first step in the right direction. Thanks a lot!