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。');