程序员的独立思考AND(eval和new Function效率区别)

baidu下一堆博文说new Function比eval要来的高效，一直有个疑惑，都是重新编译一遍js，new Function还要多执行一部函数，为什么new会更高效？

上代码先

<script type="text/javascript">
    var str='[{"打算": "aa","反倒是": "dasd","的撒": "dasd","事项": [{"事项": "gdf","事项": "gdf","事项": "df"}]},{"事项": "dsad","事项": "gsg","事项": "fds","事项": [{"名称": "fs","事项": "","事项": ""},{"名称": "","事项": "","事项": ""}]}]';
    var i=0;
    var date=new Date().getTime();
    (function(){
        //eval(str);
        (new Function('return '+str))();
        i++;
        if(i!=10000){
            arguments.callee();
        }else{
            var data2=new Date().getTime();
            document.write(data2-date);
        }
    })()
</script>

 

无论怎么测，无论任何浏览器：

eval都比new Function高效！！！

 

作为个程序员，不要去人云亦云，自己试过才知道！