Trim функция в ActionScript

[etc]

Подумаешь.

str = 'acacacbbbbddddacacacac';
trim = function (str, symbols) {
	symbols = symbols.length ? symbols : ' ';
	while (str.indexOf(symbols) == 0) {
		str = str.substr(symbols.length);
	}
	while (str.lastIndexOf(symbols) == str.length-symbols.length) {
		str = str.substr(0, str.length-symbols.length);
	}
	return str;
};
trim2 = function (str, symbol) {
	if (lastStr != str) {
		lastStr = str;
		symbol = symbol ? symbol : ' ';
		var array:Array = str.split(symbol);
		var sx:Number = 0;
		var ex:Number = array.length;
		while (array[sx] == "") {
			sx++;
		}
		while (array[ex-1] == "") {
			ex--;
		}
		array.splice(ex);
		array.splice(0, sx);
		str = array.join(symbol);
		outStr = str;
		return str;
	} else {
		return outStr;
	}
};
function trims(str:String, symbol:String):String {
	symbol = symbol.length ? symbol : ' ';
	var array:Array = str.split(symbol);
	var sx:Number = 0;
	var ex:Number = array.length;
	while (array[sx] == "") {
		sx++;
	}
	while (array[ex-1] == "") {
		ex--;
	}
	array.splice(ex);
	array.splice(0, sx);
	str = array.join(symbol);
	return str;
}
////////
t = getTimer();
for (var i = 0; i<10000; i++) {
	trim(str, 'ac');
}
trace(trim(str, 'ac'));
trace(getTimer()-t);
t = getTimer();
for (var i = 0; i<10000; i++) {
	trim2(str, 'ac');
}
trace(trim2(str, 'ac'));
trace(getTimer()-t);
t = getTimer();
for (var i = 0; i<10000; i++) {
	trims(str, 'ac');
}
trace(trims(str, 'ac'));
trace(getTimer()-t);