Ajax响应变得太慢了

Question

使用ajax从servlet获取数据时遇到问题。反应太慢了。有人建议如何更快地获取数据？以下是我的代码

function loaduedate(outlet,c) {    
    var d1 = new Date();    
    var d = new Date();    
    $.ajax({    
       url: 'GetDueDate',    
       type: 'post',    
       data: {out: outlet, opt: c},    
       dataType: 'json',    
       success: function(data) {    
           alert(JSON.stringify(data));               
           $("#txtduedateno").val(data.duedays);       

       var numdays = $('#txtduedateno').val();    
       d.setDate(d.getDate() + parseInt(numdays));    
       var weekday = new Array(7);    
       weekday[0] = "Sunday";    
       weekday[1] = "Monday";    
       weekday[2] = "Tuesday";    
       weekday[3] = "Wednesday";    
       weekday[4] = "Thursday";    
       weekday[5] = "Friday";    
       weekday[6] = "Saturday";    
       if (weekday[d.getDay()] === "Sunday") {    
           d.setDate(d.getDate() + 1);    
       }    
       }    
    });      

}    

function changeTextBoxForItem(Id1, Id2) {
    $(Id1).on("keydown", function(e) {
    if (e.keyCode == 112) {
            e.preventDefault();
            loaduedate(outletid,1);//loaduedate function calling from here             
        }
});
}