View Full Version : How Design Affects Performance

18 Oct 2007, 15:09
The first few seconds when visiting a site is important. You need to grab the reader's attention immediately. So, if your site is slow to load - you have a problem.
Success is based on
how the reader
perceives your site. Complaint I
Members complain that your site takes forever to load.

Complaint II
Members complain that some parts of your site takes forever to load. For example, the body will load but the column navigation is slow (delayed).
If you heard any of the above complaints and you wondered why - then continue reading.


This 6 part series will focus on a few key areas that affect performance on the client-side. Our focus is specifically on first-time visitors as their experience determines if they become a member.

Let me clarify a few terms before we continue:
Performance - the reader's overall experience when visiting your site
Design - the generated page (everything - not just the eye-candy)What Affects Performance

The following affects performance:
Progressive Rendering
HTTP Requests
Style sheets / Javascript Files
Size of Page / Objects
OtherProgressive Rendering

Progressive rendering is the act of displaying each object as it is downloaded.

There are 2 popular browsers right now: Internet Explorer and Firefox.
Both support progressive rendering but they differ on how they render tables. Hence, your choice of design and the reader's choice of browser can affect performance.

HTTP Requests

An HTTP Request is a request from a browser to a server. A request can be made for an HTML page or any object included within the page. Too many requests can affect performance.

Style sheets / Javascript
Style sheets describes how an object on a Web page are presented. It's a means of adding style such as font, color, position, etc to objects on a Web page. There are 3 methods you can use when styling an object: inline, internal, or external. The method that you use, it's location, size, and number can affect performance.
JavaScript is a client-side scripting language. It enables Web authors to create interactive sites. Size, location where JavaScript is embedded, and the number of files (external) can affect performance.Size of Page / Objects
The size of an object can affect performance.
Location of an object can affect performance.By understanding what affects performance, you can create a better user experience. Visitors who have a good experience will spend more time on the site. The longer a visitor stays on your site the more revenue you can earn and the more members you will have.

Next Article in this 6 part series:
How Design Affects Performance : Progressive Rendering

blackLearn More about Princeton (http://www.vbulletin.org/forum/member.php?u=925)

18 Oct 2007, 21:43
thank you!
But don't forget to mention that Safari is the Mac's browser that ships with OS X and IE isn't available for the Mac.


19 Oct 2007, 00:17
Very good! Design is very critical to a site's performance. Most people consider design as visual when actually most of the site's design is the backbone and can make or break the site.

02 May 2008, 05:37
very nice ... waiting for the next articles :)

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i have a question .. when i but javascripts codes for Ads and check the page in w3schoole i see there are errors

how i but the javascripts codes without errors in validation ?

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what the function of this code ?
.aimgbox {position: relative;overflow:auto;height:auto;width:98%;padding:5px}
img.aimg {max-width:96%;cursor:pointer}
<!--[if lte IE 6]>
.aimgbox {width:99%}
img.aimg{width: expression(this.width > 530 ? 510: true)}
is it for resizer images ?
how i use it ?

02 May 2008, 14:39
Thank you very much :)

04 May 2008, 06:22
can you answer me please

03 Sep 2009, 14:02
Very good!
Design is very critical to a site's performance :cool:

04 Sep 2009, 03:10
i use YSlow to chick my design and site
it give me: A complex page means more bytes to download, and it also means slower DOM access in JavaScript. Reduce the number of DOM elements on the page to improve performance.

how to fix this ?