Merge pull request #11 from HallofFamer/master

Update Parser.php

Author: assertchris

source/Parser.php

@@ -90,11 +90,17 @@ public function getDiscoveredCompilers()
     public function process($from)
     {
         $to = preg_replace("/\.[a-zA-Z]+$/", ".php", $from);
-        $this->compile($from, $to);
-
+        if(!$this->isProcessed($from, $to)) {
+            $this->compile($from, $to);
+        }
         return require $to;
     }
 
+    private function isProcessed($from, $to)
+    {
+        return (file_exists($to) && (filemtime($from) < filemtime($to)));
+    }
+
     public function compile($from, $to, $format = true, $comment = true)
     {
         if (file_exists($from)) {