Atlas weight issueswhat am I missing?

time to read 7 min | 1362 words

I have the strong feeling that I am missing something. We have just run into a major slow down in one of our pages, as a result of adding the CalendarExtender. This led me to do some searching, and I am not sure that I can believe the results.

Let us take this simple page:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="test.aspx.cs" Inherits="ExplodingMonkeys.Web.test" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

<html xmlns="" >

<head runat="server">

    <title>Untitled Page</title>



    <form id="form1" runat="server">

        <asp:TextBox ID="Date" runat="server" />




When rendered to the browser, it weight 528 bytes. Now, let us add a <asp:ScriptManager runat="server"/> to the page. The size of the page exploded to 79 kilobytes, from this change alone.

I then added the following to the page:

<ajax:CalendarExtender runat="server" TargetControlID="Date" CssClass="ClassName" Format="MMMM d, yyyy"
PopupButtonID="" />

The page size reached 143 kilobytes. I am pretty sure that I am missing something here. I enabled both caching and compression in the web config:


scriptResourceHandler enableCompression="true" enableCaching="true" />

And then tried again. The results were better, but not really encouraging.

With just script manager: 79 KB (56 KB from cache)
With calendar extender: 143 KB (115 KB from cache)

Just to make it clear, there is a noticable delay on our pages, it went from being instantenous to taking four or five seconds. And I am talking about localhost testing, on powerful machines. (Again that HTTP 2 connections per server issue, I think).

Am I missing something, or are those the real numbers?

More posts in "Atlas weight issues" series:

  1. (01 Mar 2007) Take 2
  2. (28 Feb 2007) what am I missing?