From 60713f0e5f1ee963bbc54b50235e0526c2d2cf53 Mon Sep 17 00:00:00 2001
From: Ingvar Stepanyan <me@rreverser.com>
Date: Sat, 22 Nov 2014 14:20:55 +0200
Subject: [PATCH] Speed up constructor spreads.

Replace slow .bind with manual .create+.apply.
Gives up to 19x speed up depending on browser.

http://jsperf.com/apply-constructor
---
 lib/6to5/templates/apply-constructor.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/6to5/templates/apply-constructor.js b/lib/6to5/templates/apply-constructor.js
index b02f831251..0c61411455 100644
--- a/lib/6to5/templates/apply-constructor.js
+++ b/lib/6to5/templates/apply-constructor.js
@@ -1,5 +1,5 @@
 (function (Constructor, args) {
-  var bindArgs = [null].concat(args);
-  var Factory = Constructor.bind.apply(Constructor, bindArgs);
-  return new Factory;
+  var instance = Object.create(Constructor.prototype);
+  Constructor.apply(instance, args);
+  return instance;
 });