Memory Consumption (Qt with DirectX)

Just a question.

I have Qt application that uses a custom widget that uses functions in an external DLL to create and render a DirectX 11 device on the application. When I run the app I see in Task Manager that it uses from 17,000 K to 22,000 K. Isn't this a bit high for an app that doesn't really do anything besides render UI and a d3d device?

The memory starts at 17,000 K, when I maximize it, it grows to 22,000 K but it never goes back to 17,000 K, even if I restore/minimize.

It also uses more memory if I show a dialog but the memory stays even after I hide the dialog. How can I destroy it and release the memory?

That figure is the "working set" and measures the memory that has been "recently" used. This is not the same thing as "currently in use". When you use C++ delete the memory is immediately released for reuse, but the memory typically remains in your working set for some OS-defined period on the assumption that your program will request more memory allocations in the near future.

http://stackoverflow.com/questions/1...p-really-using