include execution in loader perf

Author: guybedford

test/perf.html

@@ -9,6 +9,7 @@
       return {
         deps: ['module1'],
         execute: function() {
+          eval(load.source);
           return System.newModule({});
         }
       };
@@ -18,7 +19,7 @@
       document.body.innerHTML = '';
       var startTime = +Date.now();
       for (var i = 1; i <= 1000; i++)
-        System.define('module' + i, "function() {} var p = 5; // non-trivial code");
+        System.define('module' + i, "function q() {} var p = 5;\n // non-trivial code");
       System.import('module1000').then(function() {
         document.body.innerHTML = (Date.now() - startTime) + 'ms';
       }).catch(function(e) {