Using buffering in TreeBehavior::recover()

This totally explains why in the past I could not understand how
this worked at all!

src/ORM/Behavior/TreeBehavior.php

@@ -665,8 +665,7 @@ class TreeBehavior extends Behavior
             ->select($pk)
             ->where([$parent . ' IS' => $parentId])
             ->order($pk)
-            ->hydrate(false)
-            ->bufferResults(false);
+            ->hydrate(false);
 
         $leftCounter = $counter;
         foreach ($query as $row) {