I'd consider using QGraphicsScene/QGraphicsView maybe with a QOpenGLWidget as viewport. See the example "40000 ships" http://doc.qt.io/qt-5/qtwidgets-graphicsview-chip-example.html
-----Original Message----- From: Interest [mailto:interest-bounces+yves.bailly=hexagon....@qt-project.org] On Behalf Of Gibbs, Matt Sent: 15 February 2017 18:28 To: interest@qt-project.org Subject: [Interest] Optimizing performance with hundreds of widgets 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. Are there any best practices to reduce CPU usage in this case? Cheers, —Matt Matt Gibbs SLAC Accelerator Operations Group mgi...@slac.stanford.edu _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
