style="text-align: left;">absl::parallel_flat_hash_map, N=4, absl::Mutex</td>
<td style="text-align: center;">16</td>
<td style="text-align: right;">896</td>
</tr>
</tbody>
</table>
<p>It is about time we provide the complete parallel_flat_hash_map class declaration (the declaration for parallel_flat_hash_set is similar):</p>
<pre><code>template &lt;class K, class V,
          class Hash      = absl::priv::hash_default_hash&lt;K&gt;,
          class Eq        = absl::priv::hash_default_eq&lt;K&gt;,
        