Coming from MFC, I treated `qDebug()` much like `TRACE()`, assuming that it is removed from Release builds by the preprocessor (in MFC it's done using `#define TRACE 1 ? (void*) 0 : AfxTrace`).

To my surprise, however, `qDebug()` is executed in Release builds as well. How do I change this? And also, why is this so, what was the reasoning of the developers of Qt behind this decision?