Trick on iterating array concatenation

nice trick!!
http://blog.eddie.com.tw/2011/01/18/faster-array-concatenation-in-as3/

array1.push.apply( array1, array2);


<br /> package<br /> {<br /> import flash.utils.getTimer;<br /> <br /> public class Case2<br /> {<br /> private const TEST_ROUNDS:int = 50;<br /> private const ARRAY_SIZE:int = 1000;<br /> <br /> private var _bigArray1:Array;<br /> private var _bigArray2:Array;<br /> <br /> public function Case2()<br /> {<br /> trace("in Case2");<br /> <br /> test_push_and_apply();<br /> trace("");<br /> test_concat();<br /> }<br /> <br /> private function iniArrays():void<br /> {<br /> _bigArray1 = [];<br /> _bigArray2 = [];<br /> <br /> for( var i:int = 0; i< ARRAY_SIZE; ++i ) { _bigArray1.push( i ); _bigArray2.push( i ); } } private function test_concat():void { iniArrays(); trace("== TEST Array Concat =="); var timer_start:int = getTimer(); for (var i:int = 0; i< TEST_ROUNDS; i++) { _bigArray1 = _bigArray1.concat(_bigArray2); } var timer_end:int = getTimer(); trace("the length of array1 is : " + _bigArray1.length); trace("== " + (timer_end - timer_start) + " miniseconds =="); } private function test_push_and_apply():void { iniArrays(); trace("== TEST Array Push and Apply =="); var timer_start:int = getTimer(); for (var i:int = 0; i< TEST_ROUNDS; i++) { _bigArray1.push.apply(_bigArray1, _bigArray2); } var timer_end:int = getTimer(); trace("the length of array1 is : " + _bigArray1.length); trace("== " + (timer_end - timer_start) + " miniseconds =="); } } }