From 6a40cde1d8b20d1862f2fc01a880ad552f617771 Mon Sep 17 00:00:00 2001
From: Stefan Penner <stefan.penner@gmail.com>
Date: Wed, 17 Dec 2014 21:56:30 -0500
Subject: [PATCH] try our best to prevent deopt

---
 lib/backburner.js | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/lib/backburner.js b/lib/backburner.js
index 64668f9e..59ee566d 100644
--- a/lib/backburner.js
+++ b/lib/backburner.js
@@ -119,18 +119,34 @@ Backburner.prototype = {
     }
   },
 
-  join: function(target, method /*, args */) {
+  join: function(/* target, method , args */) {
+    var method, target;
+
     if (this.currentInstance) {
-      if (!method) {
-        method = target;
+      var length = arguments.length;
+      if (length === 1) {
+        method = arguments[0];
         target = null;
+      } else {
+        target = arguments[0];
+        method = arguments[1];
       }
 
       if (isString(method)) {
         method = target[method];
       }
 
-      return method.apply(target, slice.call(arguments, 2));
+      if (length === 1) {
+        return method();
+      } else if (length === 2) {
+        return method.call(target);
+      } else {
+        var args = new Array(length - 2);
+        for (var i =0, l = length - 2; i < l; i++) {
+          args[i] = arguments[i + 2];
+        }
+        return method.apply(target, args);
+      }
     } else {
       return this.run.apply(this, arguments);
     }