And it can take minutes!
It seems to take a very long time to go through every resize increment. So when enlarging the window a lot, it takes hundreds of steps, repainting each time and probably also re-calculating the shape mask (#501).
Disabling xshape does not help.
Maybe this needs
Would love to see a native solution! A workaround I'm using for such issue (which is also common with other unoptimized x11 apps running with Xming or Exceed):
run SystemPropertiesPerformance -> uncheck "Show window contents while dragging"
Could be related to #1226.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1351