<p><b>@StyXman</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/osm2pgsql/pull/813#discussion_r162039972">osmdata.cpp</a>:</p>
<pre style='color:#555'>> @@ -390,20 +390,22 @@ void osmdata_t::stop() {
     // should be the same for all outputs
     const bool append = outs[0]->get_options()->append;
 
-    //threaded pending processing
-    pending_threaded_processor ptp(mid, outs, outs[0]->get_options()->num_procs,
-                                   append);
-
-    if (!outs.empty()) {
-        //This stage takes ways which were processed earlier, but might be
-        //involved in a multipolygon relation. They could also be ways that
-        //were modified in diff processing.
-        mid->iterate_ways( ptp );
-
-        //This is like pending ways, except there aren't pending relations
-        //on import, only on update.
-        //TODO: Can we skip this on import?
-        mid->iterate_relations( ptp );
+    {
</pre>
<p>I would add a comment about why this block; at least for me, coming from Python, it's slightly strange. Otherwise, I would make the secondary effects more explicit.</p>

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