Am 15.02.2017 um 18:28 schrieb Gibbs, Matt: > 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
you might want to do setUpdatesEnabled(false); // do your updates setUpdatesEnabled(true); -- Viktor Engelmann Software Engineer The Qt Company GmbH Rudower Chaussee 13 D-12489 Berlin viktor.engelm...@qt.io +49 151 26784521 http://qt.io Geschäftsführer: Mika Pälsi, Juha Varelius, Mika Harjuaho Sitz der Gesellschaft: Berlin Registergericht: Amtsgericht Charlottenburg, HRB 144331 B _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
