cache parameters for permission check

helpers/checks/haspermsmiddleware.js

@@ -1,8 +1,10 @@
 'use strict';
 
+const cache = {};
+
 module.exports = (requiredLevel) => {
 
-	return function(req, res, next) {
+	return cache[requiredLevel] || (function(req, res, next) {
 		if (res.locals.permLevel > requiredLevel) {
 			return res.status(403).render('message', {
 				'title': 'Forbidden',
@@ -11,6 +13,6 @@ module.exports = (requiredLevel) => {
 			});
 		}
 		next();
-	}
+	})
 
 }