Finally starting to feel productive in ProjectLibre but now my Gantt has grown larger than my screen I find that scrolling is really very sluggish. I'm running on OSX with plenty of free memory. Performance in all other apps is perfectly fine. The only other app with very slow scrolling is Aptana which I believe is also Java based? I've tried running ProjectLibre with the command line arguments: "java -Xmx2048m -Dsun.java2d.opengl=true -jar projectlibre.jar" but this has made no difference. The smaller I make the Gantt Chart view port, the faster the list scrolls, to the point that if I hide the Gannt entirely by shrinking the window width, the remaining task lists scrolls up and down almost stutter free. At full screen though I'd say I'm getting may 1-2 fps scrolling, and the Gantt scroll position seems lagged behind the task list probably 2-3 seconds. My java version is:

$ java -version
java version "1.7.0_71"
Java(TM) SE Runtime Environment (build 1.7.0_71-b14)
Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)

Anybody else out there with any tips? Thanks!