nd Tsang.
    </p>

    <p>
      The uniform numbers are generated directly.  The ziggurate method is used
      to compute the normal and exponential values.
    </p>

    <p>
      In the reference, the underlying generators are implemented "inline",
      invoking a function call only in exceptional cases.  This results in
      very fast execution.
    </p>

    <p>
      In this implementation, the advantages of inline code are not used.
      All the routines and inline functions are isolated in a se