1. By Zach Archer COSC 480

2. Road map What is SPDY Timeline SPDY gateways Major Advances over HTTP Where SPDY is Currently Closing Thoughts

3. SPDY (SPeeDY) Created by Google in 2009 Potential successor to HTTP low-latency application-layer protocol Retains the semantics of HTTP Content allowed to remain unchanged SPDY is also secure Uses the standard SSL port 443

4. Time Line

5. SPDY Gateways Gateways act as translators between SPDY-enabled clients and non-SPDY-enabled servers Accelerating performance from the user experience Accelerate mobile devices as well Web companies used to collect users web-browsing information

8. Major Advances Pipelining Multiplexing and Prioritization Compressed headers Server push

9. Multiplexing and Prioritization Inspired by HTTP pipelining Multiplexing requests and responses over a single TCP connection in independent streams Prioritization Works at the application layer Allows clients to specify what is important.

10. Pipelining

11. Pipelining Continued Resources transferred through annotated “streams” With annotated streams SPDY can… Return resources in any order Interleave resources No more head of line blocking Faster web experience

12. Pipelining Continued Head of line block

13. Pipelining Continued Interleaving

14. Compressed headers HTTP headers provide additional information about the request or response Significant redundancy User-Agent Cookie headers Compress relatively effectively Out-of-band compression dictionary

15. Server push No client request needed Server uses knowledge of resources

16. So why use SPDY Its much faster SPDY vs. HTTP Unencrypted had 27% - 60% improvement Encrypted(SSL) had 39% - 55% improvement SPDY encrypted is faster than HTTP unencrypted

17. Where are we today Chrome and Firefox Google services twitter

19. Examples

21. Transitioning to SPDY Several popular client browsers Server support is continuing to grow it has not reached the adoption of client implementations has Gateways will help to accelerate the “want” Soon have more and more server support

22. Questions? How do you feel about SPDY Will it take off Why or why not How long till we see more and more sites using SPDY 6 months A year or more Are you scared Google will take over the web?

23. Review What is SPDY SPDY gateways Timeline Major Advances over HTTP Where SPDY is Currently Closing Thoughts

24. References Thomas, B., Jurdak, R., & Atkinson, I. (2012). SPDYing Up the Web. Communications Of The ACM, 55(12), 64- 73.