For those that track the content delivery networks, they are familiar with the idea that CDNs are trying to diversify their revenue by adding "value add services" to their portfolio. While that term is widely used by CDNs, and was originally coined by Akamai, I have yet to see any CDN define what it really means or which services fall under that term. After my post two weeks ago regarding AT&T teaming up with Cotendo to bring new CDN services to the market, I got a lot of questions specifically about dynamic site acceleration (DSA). I thought it would be helpful to explain what dynamic site acceleration is, what are the differences between DSA offerings, and what's the business case for the product.
Simply put, dynamic site acceleration is a suite of technologies and/or products that make websites reliant on dynamically served content perform better, load faster, and ultimately, make more money. Traditional CDNs improved performance by caching critical content closer to end users. The personalization (Facebook), streams (Twitter), geolocation (FourSquare), real-time info (Google Instant), and customization (MyYahoo) inherent in Web 2.0 have made caching content far less useful. SaaS and enterprise applications (B2B and B2C) have made the case for dynamic, transactional content, as well as the demand for ecommerce and web retailers – focusing on personalized recommendations, and transactional and secure check-out and shopping carts.
DSA augments or in many instances replaces caching by creating new ways to quickly deliver online content or deliver online services and transactions faster. This, in turn, translates into a better user experience, more user clicks and interactions, higher conversion rates and better search engine visibility. Researchers from Microsoft and Google found that a 2-second site loading slowdown resulted in 2% fewer queries, 3.75% fewer clicks, and significant decreases in user satisfaction. The Aberdeen Group found that a 1-second delay in page load time equals 11% fewer page views and a 7% loss in conversions. (In other words, a site that averages $100,000 a day in revenues would lose an additional $2.5 million in sales each year). This is precisely why Google has an entire team of engineers dedicated to shaving milliseconds off load times for search results and is the rationale for DSA.
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