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#PERFMATTERS for Android Hasan Hosgel – DevFest Hamburg 2015 anyone can cook

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Why we are developers? GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Why we are developers? ESPECIALLY ANDROID GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg Image Source: https://www.flickr.com/photos/theinfamousgdub/1765952198 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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We are smart! GDG DevFest Hamburg Image Source: https://www.flickr.com/photos/theinfamousgdub/1765952198 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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We Love Android GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg Photo by Sujaki-F 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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We have Passion GDG DevFest Hamburg Photo by Sujaki-F 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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We love challenges GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg Image Source: https://www.flickr.com/photos/68751915@N05/6793826885 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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We want Money GDG DevFest Hamburg Image Source: https://www.flickr.com/photos/68751915@N05/6793826885 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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Performance Impacts GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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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

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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

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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

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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

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Let‘s find some performance improvements GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Possible improvements CPU Memory I/O GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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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

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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

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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

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Possible improvements CPU Memory I/O •  Do not allocate memory inside onDraw() GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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LeakCanary to the Rescue h"ps://github.com/square/leakcanary GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Setup LeakCanary GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Use Your Debug Build Normally GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Analysing Memory GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Analysing Heap Dump GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Analysing Memory GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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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

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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

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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

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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

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Analysing Network First Start GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Analysing Network Second Start GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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Second Start With Caching GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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GDG DevFest Hamburg Source: http://www.flickr.com/photos/16210667@N02/9172895225 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing ArrayList GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing Bundle GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing StringBuilder GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing StringBuilder GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimizing StringBuilder GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimize Moar – The Loop GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimize Moar – The Loop GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimize Moar – The Loop GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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Optimize Moar – The Loop GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg Source: https://www.flickr.com/photos/marcus_t_ward/10715983613 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg Source: http://www.bhmpics.com/success_kid-wallpapers.html 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg Source: http://www.flickr.com/photos/21496790@N06/5065834411/ 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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GDG DevFest Hamburg 6th November 2015 #PERFMATTERS for Android – Hasan Hosgel

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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

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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