<r>OK, adding all those parameters, I can run 5.2 with HDPi support and a normal responsiveness:<br/>
<br/>
-Dcom.eteks.sweethome3d.resolutionScale=2 -Dswing.defaultlaf=javax.swing.plaf.metal.MetalLookAndFeel -Dswing.plaf.metal.controlFont=Dialog-12 -Dswing.plaf.metal.userFont=SansSerif-12 -Dswing ...

Tried to run 5.3 version without 3D view (adding -Dcom.eteks.sweethome3d.no3D=true argument), but the responsiveness issue is still present.

Also tried to pass -Dcom.eteks.sweethome3d.resolutionScale=2 to version before 5.3, but it does not seem to apply.

<r>Quick follow-up:<br/>
<br/>
- I've tested SweetHome3D on a fresh Ubuntu 17.10 install, and it frozen when I started drawing a wall (tried twice)<br/>
<br/>
<IMG src="https://i.imgur.com/7anxlGC.png"><s>[img]</s><URL url="https://i.imgur.com/7anxlGC.png">https://i.imgur.com/7anxlGC.png</URL><e ...

<r>Hi,<br/>
<br/>
Running SH3D after a long period without using it, seems I'm hitting the same issue: it's abnormaly slow.<br/>
For example, trying to draw a wall on a new project takes something like 5 seconds.<br/>
Sometimes it even takes longer for the wall to be drawn on the drawing area than ...