It’s depending of the size and the number of pixmaps you are using to construct this icon.

And if you call pixmap() function you get only a ‘just in time’ pixmap construct from the pixmap you have set.

Probably the easiest way to create your cache, implement your inherited icon engine from QIconEngineV2() … and trace what’s coming from addPixmap().

Okay, I found a simpler approach:
Instead of caching the QIcon, I simply cache all the pixmaps that go into it. Since I am the one constructing the icons, that’s pretty easy, and has the added benefit that pixmaps used both in icons and elsewhere are caches only once.

In that case: have a look at QPixmapCache then, it should have everything you need.

Yes, it does!

Thanks, all!