On Wed, Oct 10, 2018 at 1:21 PM Peter Hull <peterhull90 at gmail.com> wrote: > -Dsun.java2d.uiScale=1.0 > And this does make it fast again for me (paint time < 0.1sec)! Also I tried on an older system with "Intel HD Graphics 4600" and it did not have the slow down problem. So it seems to be quite specific to my system.