Optimizing Applications Performance

This is the slides for my presentation (optimizinzg application performance) at DevFestSW event held in ibadan 2017. it is focused on Battery, Layout and Responsive optimizations.

Transcript

1. Optimizing Applications Performance ~ best practices Speakerdeck.com/kenny_io @kenny_io
2. @kenny_io Peter Ekene Eze Android Developer @kenny_io Dzone, Dev.to, Medium Android Nigeria Com
3. So.. WHY ?? Optimizing Applications Performance “Users Demand High Performance”
4. Users Expects your app to Optimizing Applications Performance Interact Quickly Spare Battery Load Quickly
5. Users Statistics Optimizing Applications Performance • 0% Users • 49%Users • 30%Users • Every 1 in 5 Users Expects mobile page to load instantly Expects mobile page to load in 2+sec Expects App load in 20+ sec Expects mobile page to load in 3+ sec
6. Optimizing Applications Performance Users reactions and expressions
7. Optimizing Applications Performance COOL… WELLDONE!!!! 1.
8. Optimizing Applications Performance DUDE…. WTF !!!! 2.
9. Optimizing Applications Performance Jeeeeezzz..! i can’t take this anymore 3.
10. Optimizing Applications Performance Ok don’t worry, i know what to do 4.
11. Optimizing Applications Performance
12. If the app fails to deliver the right experience or fails to perform satisfactorily  It hurts the brand image  The users start uninstalling the app  Ratings start dropping  Potential sales and ad revenues disappear  And finally…….. Developer gets FIRED!! Consequences Optimizing Applications Performance
13. How can developers and enterprises implement performance best practices to keep their products afloat in such a tasking mobile era?? The Big Question Optimizing Applications Performance
14. Build Optimized Mobile Apps To Meet User Demands and Satisfy Expectations on a wide scale The Answer Optimizing Applications Performance
15. But.. HOW ?? Optimizing Applications Performance
16. Optimizing Applications Performance Battery Layout perf Response
17. Optimizing Layout Performance ABM broadcasts an action whenever the device is connected or disconnected to a power source Consider battery level and state while scheduling heavy tasks
18. Optimizing Layout Performance Doze reduces battery consumption by deferring background CPU and network activity for apps when the device is unused for some period of time Leverage On Doze Mode
19. Optimizing Layout Performance Leverage On Doze Mode
20. Optimizing Layout Performance To adapt your app to Doze, create an instance of your AlarmManager and call these methods on it . setAndAllowWhileIdle() and setExactAndAllowWhileIdle(), Adapt App to Doze
21. Optimizing Layout Performance The way you manage the hierarchy of your View objects can have a substantial impact on your app’s performance View Hierarchy
22. Optimizing Layout Performance Measure stage - the system determines the sizes and boundaries of View objects. Layout stage - Uses this data, also taking object weights into account, to appropriately position the relevant items in your view hierarchy It determines where on the screen to position the View objects. Rendering flow……
23. Optimizing Layout Performance View Hierarchy ImageView TextView TextView
24. Horizontal Linear Layout Optimizing Layout Performance View Hierarchy ImageView Vertical Linear Layout TextView TextView Vertical Linear ImageView TextView TextView
25. Optimizing Layout Performance  Removing redundant nested layouts  Adopting <Include…./> Improving hierarchy perf titlebar titlebar HELLO
26. Optimizing Layout Performance  Lint  Layout Inspector Hierarchy Diagnosis
27. Keeping Your App Responsive Optimizing Response Performance
28. Optimizing Response Performance The worst thing that can happen to your app's responsiveness is an "Application Not Responding" (ANR) dialog.
29. Optimizing Response Performance Generally, the system displays an ANR dialog if an application cannot  respond to user input event (such as key press or screen touch events) within 5 seconds.  A BroadcastReciever hasn't finished executing within 10 seconds. Causes
30. Optimizing Response Performance Activities running on the UI thread should do as little work as possible. Network or database operations should be done on a different thread (worker thread) or via asynchronous requests. Computational calculations like resizing bitmaps, should be done in the worker thread. Avoiding ANR Dialog
31. Optimizing Applications Performance Go to https://developer.android.com/training/articles/perf-anr.html https://developer.android.com/topic/performance/threads.html https://developer.android.com/training/monitoring-device- state/battery-monitoring.html#MonitorLevel https://developer.android.com/reference/android/app/AlarmMana ger.html References
32. Optimizing Layout Performance THANK YOU