Performance Testing Tools in Android - DevConf

Developing an app for the fragmented Android ecosystem can be a difficult task. Problems such as small amounts of RAM or low performance GPUs on some devices makes the job of an Android developer a difficult one. In this talk, we will discuss various tools (and how to use them) to ensure your app isn’t slow or dropping frames. Enabling your app to run smoothly across a larger set of devices.

Transcript

1. #DevConf @riggaroo Performance Testing Tools in Android Rebecca Franks @riggaroo
2. #DevConf @riggaroo Rebecca Franks Android Developer & Google Developer Expert DVT / DStv www.riggaroo.co.za @riggaroo
3. @riggaroo #DevConf Overview • What went wrong? • Types of Performance Issues • Analysing Performance issues • Pixel Pushin’ (Rendering Analysis) • Where did I put that object again? (Memory Analysis) • Does not Compute (Compute Analysis) • Battery Drain (Battery Analysis)
4. #DevConf @riggaroo What went wrong?
5. @riggaroo #DevConf “…slow…” “…laggy…” “…keeps freezing…” “…frustrating…”
6. #DevConf @riggaroo Types of Performance Issues
7. @riggaroo #DevConf Application not responding (ANR)
8. @riggaroo #DevConf OutOfMemoryError (OOM) java.lang.OutOfMemoryError: Failed to allocate a 4308492 byte allocation with 467872 free bytes and 456KB until OOM at dalvik.system.VMRuntime.newNonMovableArray(Native Method) at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609) at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444) at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java: 988) at android.content.res.Resources.loadDrawableForCookie(Resources.java:2580) at android.content.res.Resources.loadDrawable(Resources.java:2487) at android.content.res.Resources.getDrawable(Resources.java:814) at android.content.res.Resources.getDrawable(Resources.java:767)
9. @riggaroo #DevConf Dropped Frames, Stuttering & Slow animations 60 fps = 16ms per frame
10. @riggaroo #DevConf Draining a users battery
11. #DevConf @riggaroo Pixel Pushin’ Rendering Analysis
12. @riggaroo #DevConf GPU Overdraw • Colour coding to show how many times each pixel is redrawn on the screen • Used for: • Reducing rendering overhead. 1x Overdraw 2x Overdraw 3x Overdraw 4x Overdraw
13. @riggaroo #DevConf <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" android:background="#FFFFFF"> <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent">
14. @riggaroo #DevConf Hierarchy Viewer • Visualises your app’s view hierarchy • Profiles rendering speed • Good for: • Simplifying view hierarchy • Finding rendering performance bottlenecks
15. @riggaroo #DevConf
16. @riggaroo #DevConf Profile GPU Rendering • Quick visual representation of how much time it takes to render the frames of a UI window • 16-ms-per-frame benchmark. • Good for: • Quickly seeing how a UI window performs against the 16-ms-per- frame target. • Looking for spikes in frame rendering time
17. #DevConf @riggaroo Where did I put that object again? Memory Analysis
18. @riggaroo #DevConf Memory Monitor • Real time report on how much memory your app is using • Shows available memory & GC Events • Good for: • Quickly picking up OOM • If slowness is related to many GC Events
19. @riggaroo #DevConf
20. @riggaroo #DevConf No Memory Leak Memory Leak
21. @riggaroo #DevConf Heap Viewer • Real-time what types of objects your app has allocated, how many, their sizes on the heap • Eclipse Memory Analyser has a few more advanced features • Good for: • Identifying memory leaks • Seeing how your app allocates & deallocates memory
22. @riggaroo #DevConf
23. @riggaroo #DevConf Avoiding memory leaks in Android • Never store a Context or View in a static variable. • Avoid non-static inner class declarations especially AsyncTasks/Threads • Don’t store strong references to Activity/View in your AsyncTasks or background threads • Always unregister listeners in the onPause() or onDestroy() methods
24. #DevConf @riggaroo Does not compute Compute Analysis
25. @riggaroo #DevConf Systrace • Captures & displays execution times of your application processes • Useful for diagnosing display issues when: • Slow to draw • Stutters during animation • App is keeping to 60fps
26. @riggaroo #DevConf
27. @riggaroo #DevConf NimbleDroid • Automated performance analysis tool • Easy to use - upload your APK and get a report • Measures cold start time • https://nimbledroid.com
28. @riggaroo #DevConf
29. #DevConf @riggaroo Save the Battery! Battery Analysis
30. @riggaroo #DevConf Battery Historian • Collects battery data (batterystats) from device & converts into HTML visualisation • Good For: • Showing where and how processes are drawing current from the battery • Identifying tasks that can be deferred or removed • https://github.com/google/battery-historian • adb bugreport > logs.txt
31. @riggaroo #DevConf
32. @riggaroo #DevConf Avoiding Battery Drain •Avoid wake locks if possible •Defer operations that are not important •Batch operations to reduce mobile radio usage •Take advantage of the OS - JobScheduler API, SyncAdapter
33. @riggaroo #DevConf Conclusion • Lots of other tools available: Network monitor, CPU monitor, TraceView, Allocation Tracker • Use ProGuard to strip out unused code (shrinkResources & minifyEnabled) • Your users matter (especially the ones with low end devices) • Fast App = Happy Users = Good Reviews = Happy devs!
34. @riggaroo #DevConf Links • GPU Overdraw - http://developer.android.com/tools/performance/debug-gpu-overdraw/ index.html • Hierarchy Viewer - http://developer.android.com/tools/performance/hierarchy- viewer/index.html • GL Tracer - http://developer.android.com/tools/help/gltracer.html • Memory Monitor - http://developer.android.com/tools/performance/memory-monitor/ index.html • Fixing Memory leaks - http://riggaroo.co.za/fixing-memory-leaks-in-android- outofmemoryerror/ • Heap Viewer - http://developer.android.com/tools/performance/heap-viewer/ index.html • Systrace - http://developer.android.com/tools/help/systrace.html • NimbleDroid - https://nimbledroid.com/ • Battery Historian - https://github.com/google/battery-historian
35. Thank you! Questions? @riggaroo +RebeccaFranksSA http://riggaroo.co.za @riggaroo Rate me www.devconf.co.za/rate