;;;; a PCOUNTER is used to represent an unsigned integer quantity which
;;;; can grow bigger than a fixnum, but typically does so, if at all,
;;;; in many small steps, where we don't want to cons on every step.
;;;; a PCOUNTER is used to represent an unsigned integer quantity which
;;;; can grow bigger than a fixnum, but typically does so, if at all,
;;;; in many small steps, where we don't want to cons on every step.