This page is a part of my Qt resource site. Visit it for more resources, links and articles.
Qt for soft real-time projects by James S. Gibbons. An article discussing performance and timing issues when using Qt. It contains benchmarks comparing Qt, VCL and STL as well as a guide showing VCL classes along the corresponding Qt classes.
Implicit Sharing and Multi-Threading Problems by James S. Gibbons. An article discussing threading in combination with sharing – potential problems and their solutions – in a Qt environment.
Easy Qt Database Forms by James S. Gibbons. An article showing how Qt can be used to create a data-aware dialog. When reading this, the Mapping Data to Widgets Qt Quarterly article can be interesting.