javascript运行效果测试

< !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
;
}
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 >