perf parameters

Author: guybedford

test/perf.html

@@ -4,10 +4,21 @@
   </script>
   <script src="../dist/es6-module-loader.js"></script>
   <script>
+    /* PARAMETERS */
+    var TREE_DEPTH = 2;
+    var NUM_MODULES = 1000;
+
+
     System.set('module0', System.newModule({}));
     System.instantiate = function(load) {
+      var num = load.name.substr(6);
+
+      var deps = [];
+      if (num % TREE_DEPTH > 0)
+        deps = ['module' + (num - 1)];
+
       return {
-        deps: ['module' + (load.name.substr(6) - 1)],
+        deps: deps,
         execute: function() {
           eval(load.source);
           return System.newModule({});
@@ -18,10 +29,15 @@
     function start() {
       document.body.innerHTML = '';
       var startTime = +Date.now();
-      for (var i = 1; i <= 1000; i++)
+
+      for (var i = 1; i <= NUM_MODULES; i++)
         System.define('module' + i, "function q() {} var p = 5;\n // non-trivial code");
-      System.import('module1000').then(function() {
-        document.body.innerHTML = ((Date.now() - startTime) / 1000) + 'ms per module';
+      var promises = [];
+      for (var i = NUM_MODULES; i > 1; i--) {
+        promises.push(System.import('module' + i));
+      }
+      Promise.all(promises).then(function() {
+        document.body.innerHTML = ((Date.now() - startTime) / NUM_MODULES) + 'ms per module';
       }).catch(function(e) {
         setTimeout(function() {
           throw e;