From a44ddae05afdb8659e3b9153a87ec8c2b96e43b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20Sch=C3=A4fer?= <florian.schaefer@gmail.com>
Date: Tue, 14 Dec 2010 07:01:56 -0800
Subject: [PATCH] Speedup loops:
 http://blogs.sun.com/greimer/entry/best_way_to_code_a

---
 es5-shim.js | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/es5-shim.js b/es5-shim.js
index ad0f5577..e1caaf17 100644
--- a/es5-shim.js
+++ b/es5-shim.js
@@ -1,4 +1,3 @@
-
 // -- kriskowal Kris Kowal Copyright (C) 2009-2010 MIT License
 // -- tlrobinson Tom Robinson Copyright (C) 2009-2010 MIT License (Narwhal Project)
 // -- dantman Daniel Friesen Copyright(C) 2010 XXX No License Specified
@@ -85,7 +84,7 @@ if (!Array.prototype.filter) {
     Array.prototype.filter = function (block /*, thisp */) {
         var values = [];
         var thisp = arguments[1];
-        for (var i = 0; i < this.length; i++)
+        for (var i = 0, len = this.length; i < len; i++)
             if (block.call(thisp, this[i]))
                 values.push(this[i]);
         return values;
@@ -96,7 +95,7 @@ if (!Array.prototype.filter) {
 if (!Array.prototype.every) {
     Array.prototype.every = function (block /*, thisp */) {
         var thisp = arguments[1];
-        for (var i = 0; i < this.length; i++)
+        for (var i = 0, len = this.length; i < len; i++)
             if (!block.call(thisp, this[i]))
                 return false;
         return true;
@@ -107,7 +106,7 @@ if (!Array.prototype.every) {
 if (!Array.prototype.some) {
     Array.prototype.some = function (block /*, thisp */) {
         var thisp = arguments[1];
-        for (var i = 0; i < this.length; i++)
+        for (var i = 0, len = this.length; i < len; i++)
             if (block.call(thisp, this[i]))
                 return true;
         return false;
@@ -179,10 +178,10 @@ if (!Array.prototype.reduceRight) {
             } while (true);
         }
 
-        for (; i >= 0; i--) {
+        do {
             if (i in this)
                 rv = fun.call(null, rv, this[i], i, this);
-        }
+        } while (i--);
 
         return rv;
     };