PERFMATTERS for Android

The slogan '#PERFMATTERS' by Colt McAnlis is one of the most important statements, which an Android developer should follow. A well performing application makes the difference between a nice looking application and one, which gets successful. You, as an Android developer, have the responsibility to delight your users, so they don't feel how much work your application has to burden to fulfill the user's needs. This session will show you some easy optimizations and how to avoid glitches in the application. A lot of developers would shout, that this is premature optimization. In contrary it is preventive. With a small amount of work while developing you can avoid a lot of pitfalls. You will hopefully have a better understanding of the underlying system afterwards. During the session some tools and frameworks will be presented for helping you to fulfill your mission.

Transcript

1. #PERFMATTERS for Android Hasan Hosgel – DevFest Hamburg 2015 anyone can cook
2. Why we are developers? GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
3. Why we are developers? ESPECIALLY ANDROID GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
4. GDG DevFest Hamburg Image Source: https://www.flickr.com/photos/theinfamousgdub/1765952198 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
5. We are smart! GDG DevFest Hamburg Image Source: https://www.flickr.com/photos/theinfamousgdub/1765952198 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
6. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
7. We Love Android GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
8. GDG DevFest Hamburg Photo by Sujaki-F 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
9. We have Passion GDG DevFest Hamburg Photo by Sujaki-F 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
10. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
11. We love challenges GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
12. GDG DevFest Hamburg Image Source: https://www.flickr.com/photos/68751915@N05/6793826885 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
13. We want Money GDG DevFest Hamburg Image Source: https://www.flickr.com/photos/68751915@N05/6793826885 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
14. Delight our users GDG DevFest Hamburg Image Source: http://agenciabrasil.ebc.com.br/geral/foto/2014-07/cerimonia-de-premiacao-da-copa-do-mundo-no-brasil 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
15. User Expectations on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
16. User Expectations •  Mobile App Users are impatient on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
17. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
18. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s •  49% app start < 2 s on applications GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
19. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s •  49% app start < 2 s •  Users are intolerant of issues and are quick to uninstall mobile apps on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
20. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s •  49% app start < 2 s •  Users are intolerant of issues and are quick to uninstall mobile apps •  80% three attempts or less on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
21. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s •  49% app start < 2 s •  Users are intolerant of issues and are quick to uninstall mobile apps •  80% three attempts or less •  53% apps with severe issues like crashes, freezes or errors on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
22. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s •  49% app start < 2 s •  Users are intolerant of issues and are quick to uninstall mobile apps •  80% three attempts or less •  53% apps with severe issues like crashes, freezes or errors •  36% heavy battery usage on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
23. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s •  49% app start < 2 s •  Users are intolerant of issues and are quick to uninstall mobile apps •  80% three attempts or less •  53% apps with severe issues like crashes, freezes or errors •  36% heavy battery usage •  Users blame the app and the company who made it on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
24. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s •  49% app start < 2 s •  Users are intolerant of issues and are quick to uninstall mobile apps •  80% three attempts or less •  53% apps with severe issues like crashes, freezes or errors •  36% heavy battery usage •  Users blame the app and the company who made it •  55% app is responsible for performance issues on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
25. User Expectations •  Mobile App Users are impatient •  61% app start < 4 s •  49% app start < 2 s •  Users are intolerant of issues and are quick to uninstall mobile apps •  80% three attempts or less •  53% apps with severe issues like crashes, freezes or errors •  36% heavy battery usage •  Users blame the app and the company who made it •  55% app is responsible for performance issues •  37% Stated that app crashes or errors make them think less of a company’s brand on applications Source: https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
26. Performance Impacts GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
27. Performance Impacts •  500 ms delay •  bounce rate -4.7% •  conversion rate -1.9% Source: http://www.mobilejoomla.com/media/press/responsive-vs-serverside/Responsive-Design-vs-Server-Side-Solutions-Infographic.jpg GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
28. Performance Impacts •  500 ms delay •  bounce rate -4.7% •  conversion rate -1.9% •  1,000 ms delay •  bounce rate -8.3% •  Conversion rate -3.5% Source: http://www.mobilejoomla.com/media/press/responsive-vs-serverside/Responsive-Design-vs-Server-Side-Solutions-Infographic.jpg GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
29. Performance Impacts •  500 ms delay •  bounce rate -4.7% •  conversion rate -1.9% •  1,000 ms delay •  bounce rate -8.3% •  Conversion rate -3.5% •  100ms delay mean for Amazon -1% revenue Source: http://www.mobilejoomla.com/media/press/responsive-vs-serverside/Responsive-Design-vs-Server-Side-Solutions-Infographic.jpg GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
30. Performance Impacts •  500 ms delay •  bounce rate -4.7% •  conversion rate -1.9% •  1,000 ms delay •  bounce rate -8.3% •  Conversion rate -3.5% •  100ms delay mean for Amazon -1% revenue •  11% scream at there device Source: http://www.mobilejoomla.com/media/press/responsive-vs-serverside/Responsive-Design-vs-Server-Side-Solutions-Infographic.jpg GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
31. Performance Impacts •  500 ms delay •  bounce rate -4.7% •  conversion rate -1.9% •  1,000 ms delay •  bounce rate -8.3% •  Conversion rate -3.5% •  100ms delay mean for Amazon -1% revenue •  11% scream at there device •  4 % throw their phones Source: http://www.mobilejoomla.com/media/press/responsive-vs-serverside/Responsive-Design-vs-Server-Side-Solutions-Infographic.jpg https://www.flickr.com/photos/9009139@N08/1263954439 GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
32. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
33. Let‘s find some performance improvements GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
34. Possible improvements CPU Memory I/O GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
35. Possible improvements CPU Memory I/O •  Keep the work of the main thread à ANR GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
36. Possible improvements CPU Memory I/O •  Keep the work of the main thread à ANR •  Avoid GPU overdrawings •  https://www.youtube.com/watch?v=T52v50r-JfE GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
37. Possible improvements CPU Memory I/O •  Keep the work of the main thread à ANR •  Avoid GPU overdrawings •  https://www.youtube.com/watch?v=T52v50r-JfE •  Avoid nested multi-pass layouts •  http://goo.gl/Q5te24 GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
38. Possible improvements CPU Memory I/O •  Keep the work of the main thread à ANR •  Avoid GPU overdrawings •  https://www.youtube.com/watch?v=T52v50r-JfE •  Avoid nested multi-pass layouts •  http://goo.gl/Q5te24 •  Consider RenderScript for performance critical code GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
39. Possible improvements CPU Memory I/O •  Do not allocate memory inside onDraw() GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
40. Possible improvements CPU Memory I/O •  Do not allocate memory inside onDraw() •  Check for leaks •  LeakCanary à https://github.com/square/leakcanary GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
41. LeakCanary to the Rescue h"ps://github.com/square/leakcanary GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
42. Setup LeakCanary GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
43. Use Your Debug Build Normally GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
44. Analysing Memory GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
45. Analysing Heap Dump GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
46. Analysing Memory GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
47. Possible improvements CPU Memory I/O •  Do not allocate memory inside onDraw() •  Check for leaks •  LeakCanary à https://github.com/square/leakcanary GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
48. Possible improvements CPU Memory I/O •  Do not allocate memory inside onDraw() •  Check for leaks •  LeakCanary à https://github.com/square/leakcanary •  Avoid listener à EventBus GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
49. Possible improvements CPU Memory I/O •  Do not allocate memory inside onDraw() •  Check for leaks •  LeakCanary à https://github.com/square/leakcanary •  Avoid listener à EventBus •  Use SparseArray* family instead of JDK Collections/ Maps GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
50. Possible improvements CPU Memory I/O •  Do not allocate memory inside onDraw() •  Check for leaks •  LeakCanary à https://github.com/square/leakcanary •  Avoid listener à EventBus •  Use SparseArray* family instead of JDK Collections/ Maps •  Be aware that enums need more resource, but use them, if it will make sense for you GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
51. Possible improvements CPU Memory I/O •  Activate gzip compression on incoming and outgoing network traffic or FlatBuffer à  FlatBuffer: https://www.youtube.com/watch?v=iQTxMkSJ1dQ GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
52. Analysing Network First Start GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
53. Analysing Network Second Start GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
54. Possible improvements CPU Memory I/O •  Activate gzip compression on incoming and outgoing network traffic or FlatBuffer à FlatBuffer: https://www.youtube.com/watch?v=iQTxMkSJ1dQ •  Cache data on disk (image, http responses) with reasonable TTL •  Reasonable TTL •  Server side cache headers like ETag & Last-Modified GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
55. Second Start With Caching GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
56. Possible improvements CPU Memory I/O •  Activate gzip compression on incoming and outgoing network traffic or FlatBuffer à FlatBuffer: https://www.youtube.com/watch?v=iQTxMkSJ1dQ •  Cache data on disk (image, http responses) with reasonable TTL •  Reasonable TTL •  Server side cache headers like ETag & Last-Modified •  Use JobScheduler API to batch across system or better use push notifications for updateinformation GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
57. GDG DevFest Hamburg Source: http://www.flickr.com/photos/16210667@N02/9172895225 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
58. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
59. Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
60. Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
61. Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
62. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
63. Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
64. Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
65. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
66. Optimizing Bundle GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
67. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
68. Optimizing StringBuilder GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
69. Optimizing StringBuilder GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
70. Optimizing StringBuilder GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
71. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
72. Optimize Moar – The Loop GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
73. Optimize Moar – The Loop GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
74. Optimize Moar – The Loop GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
75. Optimize Moar – The Loop GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
76. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
77. GDG DevFest Hamburg Source: https://www.flickr.com/photos/marcus_t_ward/10715983613 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
78. GDG DevFest Hamburg Source: http://www.bhmpics.com/success_kid-wallpapers.html 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
79. GDG DevFest Hamburg Source: http://www.flickr.com/photos/21496790@N06/5065834411/ 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
80. GDG DevFest Hamburg https://speakerdeck.com/alosdev/perfmatters-for-android Contact: +HasanHosgel alosdev Thanks for your Attention! We are hiring: http://www.kitchenstories.de/#jobs 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
81. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
82. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
83. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
84. GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
85. GDG DevFest Hamburg https://speakerdeck.com/alosdev/perfmatters-for-android Contact: +HasanHosgel alosdev Thanks for your Attention! We are hiring: http://www.kitchenstories.de/#jobs 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel
86. Sources •  https://ssl.www8.hp.com/ww/en/secure/pdf/4aa5-7696enw.pdf •  http://www.mobilejoomla.com/media/press/responsive-vs-serverside/Responsive- Design-vs-Server-Side-Solutions-Infographic.jpg •  https://speakerdeck.com/jakewharton/eliminating-code-overhead-square-hq-2015 •  http://periplanisi.com/android/2013/11/multi-pass-viewgroup-and-performance/ •  https://slideshare.net/dougsillars/android-app-performance-europe-2015 •  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc9CBxr3BVjPTPoDPLdPIFCE GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel