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Delay with AJAX request

Delay with AJAX request

Delay with AJAX request


I have a page (written in ASP) that displays a series of titles.  When you click a title it unhides a div and then makes an AJAX request to look up more information about that particular title and then displays it in the div.

For some reason when I click the link there is quite a long pause (about 4 seconds on average) before it displays the text but on the other hand if I run the ASP on it's own eg showcsritem.asp?CSRPostID=5 it displays almost immediately.

Has anyone ever come across this sort of problem before?


Replies continue below

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RE: Delay with AJAX request


Could you post your AJAX code? There is a possiblity that your script uses the javascript setTimeout function and has been set to around 4000 milliseconds, which needs to be lowered.


RE: Delay with AJAX request

Here's the code


var xmlhttp

function showItem(CSRPostID)
if (CSRPostID.length==0)
if (xmlhttp==null)
  alert ("Your browser does not support XMLHTTP!");
var url="showcsritem.asp";

function stateChanged()
if (xmlhttp.readyState==4)

function GetXmlHttpObject()
if (window.XMLHttpRequest)
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
if (window.ActiveXObject)
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
return null;

It's the same code I've used elsewhere and not had any performance issues - if need be I can post the other scripts; there are hidden divs and server side includes and stuff which might complicate things slightly but at the moment it's a real puzzler!



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