javascript运行效果测试

 

 抽空写的一个验证JS在浏览器之间的奔跑速度测试: FF和chrome遥遥领先啊.....

 < !DOCTYPE html >
 < html >
 < head >
 < meta charset = "utf-8" /  >
     < title > js运行效率测试 <  / title >
     <  / head >
     < body style = "overflow:hidden;" >
     < script >
    var s = function (m) {
    return document.write(m)
}
var list = [];
var count = 10;
function getAverageTime() {
    var t = new Date().getTime();
    var i = 10000;
    while (i > 0) {
        i--;
        s(i);
    }
    var r = new Date().getTime() - t
        list.push(parseInt(r));
    if (count > 0) {
        count--;
        getAverageTime();
    }
}
getAverageTime();
var total = 0;
for (var n in list) {
    total += list[n];
}
s("<br/>浏览器 [" + navigator.appName + "]  输出10000个数字的平均需要的时间:   " +  + total / 10 + "毫秒");
 <  / script >
 <  / body >
<  / html >