a> gives an overview of the relative slowness
    of different hashing algorithms.
    The table shows how much time it would take to try all
    combinations of characters in an 8-character password, assuming
    that the password contains either only lower case letters, or
    upper- and lower-case letters and numbers.
    In the <code class="literal">crypt-bf</code> entries, the number after a slash is
    the <em class="parameter"><code>iter_count</code></em> parameter of
    <code class="function">gen_