ve done in my implementation of the <em>parallel_hash_map</em> within the Abseil library, adding a few extra APIs to the Abseil internal raw_hash_map.h header, which allow the <em>parallel_hash_map</em> to pass the precomputed hash value to the underlying submaps.</p>
<p>So we have all but eliminated the cost of the first step, and seen that the cost of the second step is very minimal. At this point we expect that the <em>parallel_hash_map</em> performance will be close to the one of its underlying <em>flat