Scilab 5.2 / XCOS very slow under ubuntu 8.04

[TheFrog4u]

Hello,

usually I use scicoslab under windows XP and linux (ubuntu 8.04)
because of its scicos functionality but I wanted to give the new
Scilab beta 5.2 a try. My first look unter ubuntu 8.04 was very
disapointing because it runs, but seems to have extreme resource
issues. scicoslab takes about 25 mb memory storeage while scilab
running xcos takes over 400 mb. I tried a very simple basic test on
both systems and simulaton time under scicoslab was <1s while xcos
needed 10 seconds. Am I doing something wrong? Maybe a java issue?
Should I compile scilab on my own?
BTW: Under Windows the Problem is not that big, but scilab still is
much slower than scicoslab.