de class="Dv">ZIP_CM_BZIP</code>,
    <code class="Dv">ZIP_CM_DEFLATE</code>, and
    <code class="Dv">ZIP_CM_XZ</code> 1 is the fastest compression and 9 the
    best, 0 chooses the default. For <code class="Dv">ZIP_CM_ZSTD</code>
    possible values are
    <a class="Xr" href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/ZSTD_minCLevel.html">ZSTD_minCLevel(3)</a> to
    <a class="Xr" href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/ZSTD_maxCLevel.html">ZSTD_maxCLevel(3)</a>; ne