提高数据检索JSON格式的性能 [英] Improve the performance of Data retrieving in JSON format

问题描述

现在我们正在开发的混合应用程序，并在此数据从服务器端访问和给出的数据是JSON格式。其时间超过10秒，从服务器加载数据。

Now We are developing a Hybrid App and here data is accessing from Server side and given data is in JSON format. Its takes more than 10 seconds to load the data from server.

下面是它的样本code：

Here is its sample code :

$(document).ready(function(){
    $("#cardetails").tap(function(event,ui){   

      $.ajax({       
          url:'http://wwwsampleurl.net/json/jsn_cmp.php?json=1&rcg_mobile=2&lan=en&callback=ajax_eup&pick_up_loc=AGPT01&drop_off_loc=AGPT01&country_des=ES&country_user=AE&currency=EUR&day_drop=Tue&day_pick=Tue&age_driver=30&uid=0&num_days=7&pick_up=2722&drop_off=2722&pick_up_day=13&pick_up_hour=10&pick_up_minute=00&pick_up_mon=08&pick_up_year=2013&drop_off_day=20&drop_off_hour=10&drop_off_minute=00&drop_off_mon=08&drop_off_year=2013',
          data:'',
          contentType: "application/json; charset=utf-8",
          type: "POST",
          dataType: "json",
          crossDomain:true,
          cache: false,
          async:false,
          success: function(data, textStatus, jqXHR){
              $.each(data, function(index, val) {
                  if(index=='gen'){
                      alert("gen data - "+val.pick_up_day);
                  }
                  else if(index=='company_date'){//alert('Load cars')
                      for (var i = 0, len = val.length; i < len; i++) {

                          //alert(JSON.stringify(val[i]));   
                          //    alert(val[i].car_img);
                          $('#carImages').append('<img src="'+val[i].car_img+'" width="70" height="110" alt="'+val[i].car_group+'" title="'+val[i].type+'"/>');
                       }
                   }

               });

           },
           error: function(XMLHttpRequest, textStatus, errorThrown){alert(textStatus +"-"+ errorThrown);}

        });       
    });

});

我们怎样才能提高性能？​​

How we can improve the performance?

推荐答案

由于previous说你应该建立一个内部变量，并在循环后添加到DOM。

As previous said you should build up an internal variable and add it to the DOM after the loop.

也许你可以优化在服务器端了一下，如果（指数=='根'）是一个有点昂贵。很难说wothout看到来自服务器的数据。

Maybe you could optimize a bit on the server side, the if(index=='gen') is a bit costly. Hard to say wothout seeing the data that comes from the server.

这篇关于提高数据检索JSON格式的性能的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！