There appears to have been a change in either the JAWT or the default AWT Canvas
properties on Windows in 1.4.2 (not present in 1.4.1_02) that is causing severe
performance degradation of Java applications using OpenGL through e.g. the
GL4Java library.

To reproduce, extract the attached archive. Add the jar files to your classpath
and place the .dll in your path. javac VertexArrayRange.java ;
java VertexArrayRange. Requires an NVidia GeForce family card, though the code
path in the demo which doesn't use the NVidia-specific extension also shows a
significant slowdown relative to 1.4.1_02.

The slowdown isn't affected by either the -Dsun.java2d.noddraw=true or
-Dsun.java2d.d3d=false flags. It also isn't affected by setting vs. not setting
the GraphicsConfiguration of the created Canvas (GL4Java's GLAnimCanvas class
subclasses Canvas).