We’ve found a performance issue of QtitanRibbon 4.3.0 in the use of the process. It takes a long time to switch the enabled/disabled state of QAction. Our software is similary to Office Word and it needs to switch the state of QAction in real time. In debug mode, it will take about 1.5 seconds to switch 100 QActions enabled to disabled. We wrote the test code in RibbonApplication.exe in the demo project and it took 0.1-0.2 second to switch 25 QActions. Could you please fix the problem as soon as possible.