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Mobile Consumer Experience: designing for fast response time

Mobile Consumer Experience: designing for fast response time. OSCON 2013 David Elfi Intel. Introduction. Working for AppUp since its conception More than 3 years of experience on application store businesses for different devices and areas (Consumers, Enterprise, Developers). Motivation.

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Mobile Consumer Experience: designing for fast response time

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  1. Mobile Consumer Experience: designing for fast response time OSCON 2013 David Elfi Intel

  2. Introduction • Working for AppUp since its conception • More than 3 years of experience on application store businesses for different devices and areas (Consumers, Enterprise, Developers)

  3. Motivation • Mobile applications present several challenges related to performance • Scope: Data driven applications • This talk is based on the experience collected in the development of Tizen Common Store (v0.5)

  4. Challenges - UX “3 seconds is the limit. 57% of consumers will abandon after 3 seconds of delay”1 “Bad designed websites and slow loading times are causing ‘web stress’ for internet users”2 1. http://www.strangeloopnetworks.com/resources/infographics/web-stress/poster/ 2. http://www.thestrategyweb.com/neurological-study-bad-websites-causing-web-stress

  5. Challenges - Mobile • Mobile Network • Unreliable, High Variability in latency and bandwidth • Switch 3g/Wifi Source: http://blog.davidsingleton.org/mobiletcp/ (2011)

  6. Challenges - Mobile • Device fragmentation • Deployment: no-control over Updates

  7. Your current thoughts: I know all of these, so, what is your proposal?

  8. Hybrid application: • Beta testing • Make use of platform capabilities: HTML5 • Out of the box caching capabilities • Deals with different devices

  9. Prepare Data: Decouple Backend logic from presentation into two layers

  10. Presentation Layer Services requests 3rd party services Services requests Backend logic Load Balancer …… Caching & Syndication Cache and DB syndication

  11. Comparing Presentation Layer • Pros • Adapt the data to be cached according to UX • Services mash ups just for presentation • Horizontal scalability • Specialized teams (Backend vs Presentation + FrontEnd) • Cons • More infrastructure to maintain • More pieces to join for a single application

  12. Be cache-ful: • Data as close to the device helps response time • Minimizes data transfer

  13. Data design: Design and enable strong caching strategy

  14. Date Design - Key Task • Split data flows into general and user specific • Adapt General Data with user specific at Presentation layer

  15. Application details • Skeleton cached • Asynch call for specific info

  16. Identify Caching Points • Device Network: • Carrier Caching • Proxies CDN with WW Coverage User Caching Presentation Layer Cache by period of time User Caching Caching & Syndication User Caching Cache and DB syndication Caching Point General Data User Specific Data

  17. Results • Be cache-ful using Presentation Layer • Immediate response time (warm start) • Cold start: CDN publishing minimizes round trip • Reduce data transfer (almost 50%) • Hybrid application • Continuous development • Minimize Testing resources (AB Testing)

  18. Network Optimization • CDN caching  static and “dynamic” content • Minimum number of HTTP requests • Optimize CSS/JS files • Avoid HTTPS for public data (cost/configuration) • Sign resources in case you want to validate source • Zip data transfers (HTTP compression + packages to be installed) • HTTP Pipelining

  19. Remember! Always check performance on the client

  20. Q&A

  21. Thanks! david.r.elfi@intel.com @elfoTech

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