close() prepared statement when its not needed anymore

MysqliDb.php

@@ -961,8 +961,11 @@ class MysqliDb
                     $x[$key] = $val;
             }
             $this->count++;
-            array_push($results, $x);
+            array_push ($results, $x);
         }
+        if ($shouldStoreResult)
+            $stmt->free_result();
+        $stmt->close();
         // stored procedures sometimes can return more then 1 resultset
         if ($this->mysqli()->more_results())
             $this->mysqli()->next_result();

tests/mysqliDbTests.php

@@ -400,5 +400,6 @@ $db->delete("products");
 //print_r($db->rawQuery("CALL simpleproc(?)",Array("test")));
 
 print_r ($db->trace);
-echo "All done";
+echo "All done\n";
+echo "Memory usage: ".memory_get_peak_usage()."\n";
 ?>