Issue

A lot users experienced after the upgrade from XP to Win 7 that running Mathlab from a X-Win session was much slower then before. If you experience something like that, then try to disable the offscreen pixmap support.

How to

In your home directory you should have the file 'java.opts'. Then add additional the line ' -Dsun.java2d.pmoffscreen=false '.

Then start again the X-Win session