While searching for methods to optimize my KDE4 installation on Ubuntu 10.04 LTS , someone suggests the raster graphics system instead of the default.
Change the default paramter in startkde4 script to
plasma-desktop -graphicssystem raster
I've totally no idea what's better and the current one using on my system. How should i find it out , and compare them ? (I'm not using ATI's driver for now , is that XV or opengl ? )