// this must be run -readahead off to look for memory leaks

// If a leak is present, then the memory usage as displayed by Usage
// will increase.

macro show()
{
  iso = Isosurface(data);
  Print(iso);
}

data = Import("cloudwater");

show();  
show();
Executive("flush cache");
Usage("memory", 0);


show();
Executive("flush cache");
Usage("memory", 0);

show();
Executive("flush cache");
Usage("memory", 0);