e, <a href="Pervasives.html#VALcompare"><code class="code">compare</code></a> is
   a suitable comparison function, provided there are no floating-point
   NaN values in the data.  After calling <code class="code"><span class="constructor">Array</span>.sort</code>, the
   array is sorted in place in increasing order.
   <code class="code"><span class="constructor">Array</span>.sort</code> is guaranteed to run in constant heap space
   and (at most) logarithmic stack space.
<p>

   The current implementation