Qt, as a framework, makes extensive use of touch - particularly on mobile and embedded devices. Unfortunately, Qt isn’t readily able to magically make touch input appear on hardware that doesn’t support it, which can make exact testing of touch-related code difficult in typical developer...
When software goes slow, generally, the first reaction is to profile. This might be done through system tools (like Instruments on OS X, perf/valgrind/etc on Linux, VTune, etc). This is fine and good, but just because you have the output of a tool does not necessarily correlate to understanding...
I've had a long, quiet time on this blog over the past few years while I've been frantically helping Jolla to launch their self-named product: the Jolla. I've enjoyed (almost) every day I've been there: they really are a great bunch of people and the work has been plentiful and challenging.But as...