AS Array Object生成性能测试

Array和Object

其实

var list:Array = new Array;
var arg:Object = new Object;

比

var list:Array = [];
var arg:Object = {};

慢

证明：
new Object和{}进行比较

var length:int = 1000000;
for(var i:int = 0; i < length; i ++){
  var list:Object = new Object;
}
trace(getTimer());
// trace: 754

var length:int = 1000000;
for(var i:int = 0; i < length; i ++){
  var list:Object = {};
}
trace(getTimer());
// trace: 547

new Array和[]进行比较

var length:int = 1000000;
for(var i:int = 0; i < length; i ++){
  var list:Array = new Array;
}
trace(getTimer());
// trace: 1803

var length:int = 1000000;
for(var i:int = 0; i < length; i ++){
  var list:Array = [];
}
trace(getTimer());
// trace: 604

从这个例子还可以看出实例化Object比Array快