1 files changed, 4 insertions, 1 deletions
diff --git a/src/HTML5.php b/src/HTML5.php
index 94faa1e..c857145 100644
--- a/src/HTML5.php
+++ b/src/HTML5.php
@@ -212,7 +212,10 @@ class HTML5
         $trav = new Traverser($dom, $stream, $rules, $options);
 
         $trav->walk();
-
+        /*
+         * release the traverser to avoid cyclic references and allow PHP to free memory without waiting for gc_collect_cycles
+         */
+        $rules->unsetTraverser();
         if ($close) {
             fclose($stream);
         }