Optimizing Apps for Technical Constraints in Emerging Markets

Editor's Notes

1. Optimizing Apps For Technical Constraints in Emerging Markets Eric Tyler – Erict19@gmail.com ------------------
2. SLIDE 19: Data constraints Utilize caching and compression: https://code.facebook.com/posts/1365439333482197/how-we-built-facebook-lite-for-every-android-phone-and-network Caching: https://www.youtube.com/watch?v=7lxVqqWwTb0&index=1&list=PLOU2XLYxmsIKEOXh5TwZEv89aofHzNCiu https://www.youtube.com/playlist?list=PLOU2XLYxmsIKEOXh5TwZEv89aofHzNCiu Minimize APK size - http://stackoverflow.com/questions/3815269/how-to-reduce-app-apk-size Optimize data fetching and pushing: https://code.facebook.com/posts/1365439333482197/how-we-built-facebook-lite-for-every-android-phone-and-network Build asynchronous requests: http://gsmaterminals.github.io/Developer-Guidelines-Public/#4_1_asynchrony Network Constraints Optimize client-server & network interaction - http://developer.android.com/training/efficient-downloads/efficient-network-access.html & http://developer.android.com/training/basics/network-ops/managing.html & https://code.facebook.com/posts/952628711437136/classes-performance-and-network-segmentation-on-android/ Consider an offline mode: http://gsmaterminals.github.io/Developer-Guidelines-Public/#3_2_3_offline_mode Include low-bandwidth rendering: http://gsmaterminals.github.io/Developer-Guidelines-Public/#3_2_4_bandwidth_awareness Account for wifi offloading: http://www.aptilo.com/mobile-data-offloading/wifi-offload-3g-4g Hardware constraints Adapt application behavior for different device classes - https://github.com/facebook/device-year-class Minimize RAM, battery and storage → Ram -https://source.android.com/devices/tech/debug/procstats.html Power - https://source.android.com/devices/tech/power/index.html Battery - https://source.android.com/devices/tech/power/batterystats.html Memory -- http://developer.android.com/training/articles/memory.html Account for multiple screens: https://github.com/facebook/device-year-class Ensure background is dormant: http://gsmaterminals.github.io/Developer-Guidelines-Public/#4_6_background_foreground_modes --------- Efficient Network Connection Usage Account for seamless network switching Offloading to wifi Asynschony Offline mode Bandwith Awareness Efficient network connections Optimized Traffic Usage Utilize Compression Dormant background mode methods of optimal data transmission (efficient protocols, caching, compression, data aggregation, pipelining, etc.) Resilient to changing network conditions Support Compression Usability/ Asynchrony (Asynchronous requests) Techniques such as pipelining and asynchrony should be used to ensure that the client operates smoothly Efficient network connection usage Use strategies that minimiseand optimise data traffic and avoid unnecessary data transfers, especially when roaming. Background/ foreground modes Deactivate background processes when not required. Deactivate background processes when not required. Background/ foreground modes, Scheduling Design polling applications to aggregate their network activities. Connection loss and error handling Applications should be resilient to changing network conditions and errors. Compression Applications using HTTP should support compression. Data push Applications should use push services in preference to polling. Slow connectivity -Provide low-bandwidth UI for seamless downgrade -Use progress rendering -Prioritize serving the most popular user request Intermittent connectivity -Work seamlessly between 2g/3g/LTE -Pre-cache and download when wifi available -Core usability in offline when connection lost Hardware — Account for capability for small screens — Built for limited RAM/local storage — Optimize for minimal batter usage Software —Optimize for small app footprint —Provide an mobile-web version Costs —Minimize cost from download through usage — Only update when necessary and small size — Communicate the value-add of updates