
is explicitly called earlier.</p>
<p>Regardless of future method, the return value will be copied back
into the parent process. This matters for two reasons.</p>
<p>First, if the return value is very large, the copying process can
take some time—and because the data must essentially be serialized to
and deserialized from rds format, it can take a surprising amount of
time. In the case of future blocks that execute fairly quickly but
return huge amounts of data, you may be better off not using
future/asyn