P3: Somewhat important
windows 7 64bit
I moved my code from Qt 5.9.6(msvc15) to 5.12.0(msvc17) and noticed that
QTimer slows down when I move mouse cursor over a window area (example code attached)
When I run my example in 5.9.6 'avg' times stay at 2ms and 50ms at all times.
When I run the example in 5.12.0 'avg' times rise during cursor movement(as well as dial update).
This picture shows 'avg' times without cursor movement:
This one shows 'avg' time with cursor movement. In case of QTimer period of slot calls rises from 2ms to nearly 5ms.
Why this different behaviour between 5.9.6 and 5.12.0 ?
- resulted from
QTBUG-60437 add full-featured Windows Ink support: generate QTabletEvents