map</em> and <em>parallel_flat_hash_map</em> interchangably. They refer to the same data structure. The name used in my Abseil fork is <em>absl::parallel_flat_hash_map</em>, as it may be desirable to also provide a <em>absl::parallel_node_hash_map</em>.</p>
</blockquote>
<h3 id="the-parallel-hashmap-memory-usage">The Parallel Hashmap: memory usage</h3>
<p>So, without further ado, let's see the same graphs graphs as above, with the addition of the <em>parallel_flat_hash_map</em>. Let us first look at memory 