From 941359b2f76b7e8e0a2e582e507cae90d4e759f8 Mon Sep 17 00:00:00 2001
From: Tobie Langel <tobie.langel@gmail.com>
Date: Sun, 14 Oct 2007 11:12:08 +0000
Subject: [PATCH] Performance enhancements to . Closes #9464

---
 CHANGELOG    |  2 ++
 src/array.js | 23 ++++++++---------------
 2 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index f7b8493..79b0dea 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Performance enhancements to $A. Closes #9464. [Samuel Lebeau]
+
 * Make Function#argumentNames work with named functions. Closes #9826. [Samuel Lebeau]
 
 * Add Object.isHash. [Tobie Langel]
diff --git a/src/array.js b/src/array.js
index db192be..499a42f 100644
--- a/src/array.js
+++ b/src/array.js
@@ -1,26 +1,19 @@
 function $A(iterable) {
   if (!iterable) return [];
   if (iterable.toArray) return iterable.toArray();
-  else {
-    var results = [];
-    for (var i = 0, length = iterable.length; i < length; i++)
-      results.push(iterable[i]);
-    return results;
-  }
+  var length = iterable.length, results = new Array(length);
+  while (length--) results[length] = iterable[length];
+  return results;
 }
 
 if (Prototype.Browser.WebKit) {
   function $A(iterable) {
     if (!iterable) return [];
-    if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') && 
-        iterable.toArray) {
-      return iterable.toArray();
-    } else {
-      var results = [];
-      for (var i = 0, length = iterable.length; i < length; i++)
-        results.push(iterable[i]);
-      return results;
-    }
+    if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
+        iterable.toArray) return iterable.toArray();
+    var length = iterable.length, results = new Array(length);
+    while (length--) results[length] = iterable[length];
+    return results;
   }
 }