Figure 9-10. Bandwidth savings by adopting delta encoding at PubSub.com

Chapter 9 - Advanced Web Performance Optimization

Sites that have adopted delta encoding for RSS news feeds report that the average request was reduced by 75% (see Figure 9-10).15 Bob Wyman estimates that if everyone had adopted the RFC 3229 protocol for RSS news feeds, the bandwidth for his now-defunct news aggregation site PubSub.com would have been reduced by two-thirds.

rss delta encoding savings for pubsub.com

Figure 9-10. Bandwidth savings by adopting delta encoding at PubSub.com

Wyman, B. October 3, 2004. "Massive Bandwidth Savings proven!"
As I May Think, http://wyman.us/main/2004/10/massive_bandwid.html (accessed February 11, 2008).