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  21 
  22 The Unithread Circular tests are pretty basic.
  23 The main program allocates an array of objects and
  24 the generates a circular linked list from them.
  25      A->B->C->A
  26 The circularity is then removed from the array
  27 as more objects are allocated. The circularities
  28 should be garbage collected to make room for the new
  29 obects.
  30 
  31 Circular1 uses 5000 objects of 100 bytes (or so) apiece
  32 in chains of 5 objects apiece in a singly-linked list.
  33 
  34 Circular2 uses 10000 objects of 1000 bytes (or so) apiece
  35 in chains of 100 objects apiece.
  36 
  37 Circular3 is the same as Circular1, but uses a local
  38 Random Number Generator to access the arrays in a non-linear
  39 way.
  40 
  41 Circular4 is the same as Circular2, but uses a local
  42 Random Number Generator to access the arrays in a non-linear
  43 way.