GraphicsView performance problems

[camel]

[2] 25.0 0.01 0.00 GridScene::drawBackground(QPainter*, QRectF const&) [2]
0.00 0.00 36506/36506 GridScene::setupArray(QVarLengthArray<QLineF, 100>&, QRectF const&) [12]
0.00 0.00 36506/36506 GridScene::drawLines(QPainter*, QVarLengthArray<QLineF, 100>&) [13]

That looks really weird.
The reason probably once again that the time is spent inside of Qt-Code and not yours, so sadly that does not help.
Or it could have been inlined, again not really helpfull :-/


Have you tried valgrind/callgrind and KCacheGrind as a profiler? It is rather nice :-)