On Mittwoch, 15. Februar 2017 17:28:22 CET Gibbs, Matt wrote: > Hi All, > > I’m working on a Qt-based project to display rapidly updating information > from a control system. I want to display hundreds of signals, each > updating at about 10 Hz. As a performance test, I’ve thrown 500 Labels in > a grid layout, and fire a timer every 100 ms which calls setText on each > label. This ends up being surprisingly CPU-intensive: on reasonably modern > hardware (2012 MacBook Pro), I use 70% of one CPU. This doesn’t leave me > much overhead to do anything else.
I get about 25% CPU usage on my 2.5GHz Linux Notebook. And when I use a single custom widget to draw all texts in a single paintEvent, CPU usage drops to about 15%. https://gitlab.com/gschwann/WidgetsPerformance -- Günter Schwann | Freelancing Software Engineer | Qt Expert Partner Consultant of Viking Software guen...@vikingsoft.eu _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
