Index: src/core.js
===================================================================
--- src/core.js	(revision 6000)
+++ src/core.js	(working copy)
@@ -1117,8 +1117,17 @@
 		return elem[ name ];
 	},
 
+	// Trim function by Ariel Flesler
+	// http://flesler.blogspot.com/2008/11/fast-trim-function-for-javascript.html
 	trim: function( text ) {
-		return (text || "").replace( /^\s+|\s+$/g, "" );
+		if( !text )
+			return "";
+
+		var start = -1,
+			end = text.length;
+		while( text.charCodeAt(--end) < 33 );
+		while( text.charCodeAt(++start) < 33 );
+		return text.slice( start, end + 1 );
 	},
 
 	makeArray: function( array ) {
@@ -1126,7 +1135,7 @@
 
 		if( array != null ){
 			var i = array.length;
-			// The window, strings (and functions) also have 'length'
+			// The window, strings and functions also have 'length'
 			if( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval )
 				ret[0] = array;
 			else
Index: test/unit/core.js
===================================================================
--- test/unit/core.js	(revision 6000)
+++ test/unit/core.js	(working copy)
@@ -1795,7 +1795,7 @@
 	equals( c[0].nodeValue, "hi", "Check node,textnode,comment contents is just the one from span" );
 });
 
-test("jQuery.makeArray", function(){
+test("makeArray()", function(){
 	expect(15);
 
 	equals( jQuery.makeArray(jQuery('html>*'))[0].nodeName, "HEAD", "Pass makeArray a jQuery object" );
@@ -1830,3 +1830,24 @@
 
 	ok( jQuery.makeArray(document.getElementById('form')).length >= 13, "Pass makeArray a form (treat as elements)" );
 });
+
+test("trim()", function(){
+	expect( 10 );
+	
+	var parse = jQuery.trim;
+	
+	equals( parse(""), "", "Empty String" );
+	equals( parse("  "), "", "Empty, with spaces" );
+	equals( parse(" \n\t\r  "), "", "Empty, with new lines, tabs, etc" );
+	
+	equals( parse("abc"), "abc", "No spaces" );
+	
+	equals( parse("abc  "), "abc", "Trailing spaces" );
+	equals( parse("abc \n\t\r  "), "abc", "Trailing new lines, tabs, etc" );
+	
+	equals( parse("  abc"), "abc", "Leading spaces" );
+	equals( parse(" \n\t\r abc"), "abc", "Leading new lines, tabs, etc" );
+	
+	equals( parse("  abc  "), "abc", "Both leading and trailing spaces" );
+	equals( parse(" \n\t\r abc \n\t\r "), "abc", "Both leading and trailing new lines, tabs, etc" );
+});
\ No newline at end of file