Optimizing Graphical Web Content: Ten Dos and Don’ts

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Don't Use Progressive JPEG

Don't use progressive JPEG. According to recent research, progressive JPEG provides the low-resolution version of the image much faster, but results in negative user association and poorer emotional reaction compared to other image optimization techniques.

Looking at all of the dos and don’ts, you may understand why some sites aren’t investing enough in image optimization. Candidly, the amount of work required per image can be too high and too complex to have it done 50X over per page of the website. Therefore, investing in an automation tool that can help perform a fair number of optimization tasks can easily result in up to 50 percent load time reduction for many of the websites that have nice graphics. Some of these tools can even optimize images on the fly per browser. So, no matter what browser is being used, you can still maximize the acceleration value it can deliver, which is the whole point of image optimization, isn’t it? 

If you were presented with the graphic interface of eBay’s website from 1995, 2005 and today, which website would you most likely buy from? It's a safe bet that their current site would be your preferred choice, as it appears more professional and engaging compared to previous years.

RadwareEbay

Notice how the pages have improved since 1995. Year after year, the site has improved to generate a much more pleasant user experience. But this improved UX has come with a price: increased payload. New designs include more graphics and image resources to build a better experience for the customer, but this added content increases the page payload. According to recent data from httparchive.org, images represent over 60 percent of an average web page’s payload (about 1.1 MB of images per page). The implication is that today’s web pages take longer to load, averaging 11.4 seconds. As a result, the end user may also receive a negative quality of experience.   

Armed with this information, one would think that site owners who invest time, resources and money on their websites would also invest in optimizing their site images for faster download. Unfortunately, this is not the case. Data has shown that 56 percent of websites either do a poor job of optimizing images or don’t do it at all. The question to be asked is what can be done when optimizing images for websites and what should you avoid? In this slideshow, Yaron Azerual, product manager, Application Delivery for Radware, has identified a list of five dos and don’ts when it comes to image optimization.

 

Related Topics : SharePoint, Web Video and Voice Conferencing, UK, MySpace, Intranets

 
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