I've noticed that when running under the latest version of Java on OS
X, simulations will run fine under 2D visualization, then suddenly
drop to half their speed for a few seconds, then jump up to full speed
again, and back down, and so on. I'm trying to nail down what might
be the problem. I regressed to very early versions of MASON and
they're all having the problem so I suspect it may be something
tickled by Apple. However I can't reproduce it with simple animation
tests outside of MASON. Has anyone else seen this?