diff --git a/MD_STD.php b/MD_STD.php
index fe93d44..2313e4a 100644
--- a/MD_STD.php
+++ b/MD_STD.php
@@ -63,7 +63,13 @@ final class MD_STD {
             throw new MDFileDoesNotExist("There is no file {$filepath}");
         }
 
-        return \array_values(\array_diff($output, ['.', '..', '.git']));
+        // Remove unwanted files from list
+        $output = \array_diff($output, ['.', '..', '.git']);
+
+        // Return array values, to make it a list rather than an associative array.
+        // This should be done in a separate line, as it observably leads to a
+        // significant reduction in the used RAM.
+        return \array_values($output);
 
     }