Final optimization

Author: tvdijen

src/XML/DOMDocumentFactory.php

@@ -212,7 +212,7 @@ public static function normalizeDocument(Dom\Document $doc): Dom\Document
             $root->setAttributeNS(C::NS_XMLNS, $name, $value);
         }
 
-        return $doc;
+        return Dom\XMLDocument::createFromString($doc->saveXml($doc->documentElement));
     }
 
 

src/XML/SerializableElementTrait.php

@@ -43,6 +43,7 @@ public function __toString(): string
 
         // Non-normalized path
         $doc->formatOutput = $this->formatOutput;
+        $doc = Dom\XMLDocument::createFromString($doc->saveXml($doc->documentElement));
         return $doc->saveXml($doc->documentElement);
     }