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HomeHomeUsing DNN Platf...Using DNN Platf...Skins, Themes, ...Skins, Themes, ...How to reduce size to make load speed faster?How to reduce size to make load speed faster?
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11/19/2007 4:14 PM
 
Chris Suttman

Joined: 12/6/2005
Posts: 25

I'm getting a lot of complaints about our DNN 4.7 site being slow. According to my PDA (which shows how much is loading in real time) the home page is almost 600k. The skin and graphics are less than 40k, so the rest seems to be DNN stuff.

I used IE to save the page with "webpage complete" and the total size such as  the file is almost 400k (I'm not sure why the 200k difference between saving and viewing). The folder it created contains some pretty big files such as ScriptResource.axd = 83k, spmenu.js = 67k, ScriptResource(1).axd = 29k, dnn.js = 29k. I set compression on it already, but that didn't make much difference in load time.

The site is hosted in-house and the database is on SQL Server 2005 and is very fast. Even internally, the site takes forever to load... so I'm not sure the problem is only the size.

Check it our for yourself at https://secure.gwnsecurities.com/advisor

Any suggestions on how to reduce the size to make it faster?
 
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11/19/2007 7:13 PM
 
Lance Long


Joined: 7/22/2006
Posts: 367

One thing I do is seperate the Admin CSS from the public styles.  John Mitchell outlines how here. 

I also empty the portal.css file (largely empty anyway) and leave the heavy loading to skin.css

Next, you could format the CSS with this tool to take out white space.

The biggest propblem however is the uncompressed code.  The AJAX library is 215K + 64K alone.  Try turning on compression for CSS and JS on in IIS.
 
New Post
11/19/2007 7:18 PM
 
Lance Long


Joined: 7/22/2006
Posts: 367

lancelong wrote

The biggest problem however is the uncompressed code. 

My mistake, you seem to have compression on but it isn't working very well for the AJAX library.
 
New Post
11/20/2007 5:15 PM
 
Chris Suttman

Joined: 12/6/2005
Posts: 25

Thank you VERY much lancelong!

I trashed all the css in both the default.css and portal.css files. The admin areas are kind of funky now, but the speed boost is awesome! I never would have thought CSS makes such a difference. I tried the code in John Mitchell's article with no luck. No big deal though.

The CSS optimizer tool is great too.

As for the compression... I set compression in DNN. You mentioned setting compression in IIS. Do they both do the same thing?

I found the following articles on technet to update compression. I can't find anything that says what files are recommended to be added to the compress list or how to tell what file types are currently in the list.

 Enabling HTTP Compression (IIS 6.0)
http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/d52ff289-94d3-4085-bc4e-24eb4f312e0e.mspx?mfr=true

Customizing the File Types IIS Compresses (IIS 6.0)
http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/d52ff289-94d3-4085-bc4e-24eb4f312e0e.mspx?mfr=true

 

 
 
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11/20/2007 8:35 PM
 
Lance Long


Joined: 7/22/2006
Posts: 367

By default IIS does not compress support files like JS and CSS.  I use Pageblaster for DNN files as I like the functions I can perform on the pages once built.  Neither will have an effect on JS and CSS however since both are served outside .net thus outside DNN.  They're all IIS business.

If you really want to get serious about page load speeds then go here: http://developer.yahoo.com/yslow/  (an FF firebug plugin) and watch this explaining it all http://developer.yahoo.net/blogs/theater/archives/2007/08/steve_souders_high_performance.html
 
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