[quote author="Franzk" date="1283406222"]Just because the memory footprint of a program is growing, it doesn't mean there is a memory leak. As Denis stated, the WTM is a rather crude tool and can therefore only really be used for a crude overview. [/quote]
I know WTM is not a good tool for that, but I thinks it can give me an idea of memory usage. Maybe this is not a memory leak, but it sound strange to me that a simple do-nothing application use so much memory and that it increases even if I do nothing. The same do-nothing application implemented as dialog (without the subwindow) has a stable memory usage. Increasing memory footprint dones't mean memory leak, of course, but if it isn't a memory leak, it is memory used somewhere by the application. In this case the application does nothing at all, so I suppose is Qt that is doing something with that memory.
Is that a normal behaviour for a Qt application?
My real-application, with about 64 QSpinBox into a subwindow, refreshed every 250ms, easly eats megabytes. At first I supposed there is a memory leak in my code, even it don't use the freestore, but then I extract the piece of the GUI I had posted. Of couse, maybe I have a problem with my code also.