Loading images from files, inputstreams, or URLs via the variants of
Toolkit.getImage( ... ) is incredibly slow in gcc-4.0-20050130.

Even creating a few small icons incurs noticable overhead (some seconds)
on my Athlon 2600+. Loading JPG-images of ~800x600 pixels can take over
ten seconds.

No seperate testcase, but you can use the testcase for bug 19839 
(supply a bigger image instead of the small 64x64 icons) or the 
program attached to  http://gcc.gnu.org/ml/java/2005-02/msg00016.html