js 冒泡排序

 var arr = [];
    for(var i=0; i<100000; i++){
        arr.push(parseInt(Math.random()*100))
    };
    var t1 = Date.now();

    for(var j=arr.length; j>0; j--){
        for(var k = 0; k<j; k++){
            if(arr[k]>arr[k+1]){
                var t = arr[k];
                arr[k] = arr[k+1];
                arr[k+1] = t;
            };
        };
    };
    var t = new Date(Date.now() - t1).getSeconds(); // 30
    console.log(arr,'\n给一万个随机数字升序排列一共花费',t,'秒。');