ts of the
        Boost.Serialization library is eligible for this optimization, but the type
        must be registered in advance. To register a C++ type, invoke the C++ function
        <code class="computeroutput"><a class="link" href="../boost/mpi/python/register_serialized.html" title="Function template register_serialized">register_serialized</a></code>.
        If your C++ types come from other Python modules (they probably will!), those
        modules will need to link against the <code class="com