I have a program that is using a 3-dimensional array of doubles to hold data
for an image. For example, a 300x300 pixel image would be a
double[300][300][3]. (the last dimension holds red-green-blue values.)

Anyway, the java runtime in 1.1.x is much slower to instantiate this large
data structure than in the 1.0.x runtime.

Here's my test code:


  class Test {
    public static void main(String argv[]) {
      double BigVariable[][][];

      BigVariable=new double[300][300][3];
    }
  }

With the 1.0.2 JDK, the time to run this code is:

% /usr/bin/time java Test
real 4.8
user 4.1
sys 0.5

With the 1.1.x JDK (and I've tried both 1.1 and 1.1.3):

% /usr/bin/time java Test
real 43.9
user 42.3
sys 0.7


An order of magnitude slower!