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Hi,

I am having a problem with QGraphicsItem Build. Working arround a QGraphicsView, the purpose of the program is to show geographical data.
With Qt 4.5.0, Data is loading fast, then from data QGraphicsItem build is pretty fast to.
But since Qt 4.5.1 and newer version data loading is still fast but not QGraphiscItem Build.

And the more QGraphicsItem are already created the more time is needed for next Item to be done (like if items had to arrange in order somewhere... But thats not the case in my coding part).
So to avoid QGraphicsScene possible implication I delayed putting items in the Scene until all items are created (no change), however the setBspTreeDepth is correcly initialized...
Tryied to simplify my items just for test, same result...
Items have item parent (in case this is an issue...)

The same code built with 4.5.0 work fine, built with 4.5.X ( X > 0 ) is slow.
The same code built running with 4.5.0 dll is fine, built with 4.5.X ( X > 0 ) is slow.

after loading part everything is normal both case.

I have between 50 000 and 500 000 items to load and I'd like to use to new Qt library, and be able to use the LGPL licence.

I am open to any thinking know.
Thank for reading my poor english, let me know if you have an idea.