This document is a presentation on mobile application performance given by Doug Sillars of AT&T. It discusses the importance of mobile performance, aspects of performance to test like memory usage and network connectivity, and tools for testing performance like AT&T's Application Resource Optimizer which analyzes network traces and grades apps on best practices. The presentation emphasizes that performance is critical for user experience and engagement.

1. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks
contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a specific company or
entity is not an endorsement by AT&T.
Doug Sillars
Native Mobile Performance
AT&T Developer Advocacy
@Dougsillars
Your App is Not a Black Box

2. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• Christmas Day Sale: John Lewis – 75% traffic from
Mobile
• Amazon – 70% shopped on Mobile
Mobile is Huge
http://www.theguardian.com/business/2015/dec/27/online-christmas-sales-shoppers-
new-record-store-frenzy
http://phx.corporate-ir.net/phoenix.zhtml?c=176060&p=irol-newsArticle&ID=2125057

3. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks
contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a specific company or
entity is not an endorsement by AT&T.
Mobile Website Size (2011-2015)
Source:
HTTPArchive

4. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Source:
GSMA Intelligence
4G Subscriber Base

5. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
App Startup
91%
https://t.co/7bMT4A1PIt
49% 72%

6. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
App Conversions by Install Size
https://lightspeedindia.wordpress.com/2014/06/12/unbundling-mobile-apps-for-the-emerging-markets/

7. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
http://blog.jana.com/2015/01/26/the-data-trap/
Hours of Work at Minimum Wage to Buy 500MB

8. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
https://www.flickr.com/photos/photocapy/43580405/sizes/o/in/photostream
© 2016 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All
other marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change.
Mention of a specific company or entity is not an endorsement by AT&T.

9. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Testing is Key
• 44% of all issues are reported by users
• 20% issues were only found because of
complaints in app reviews
http://info.perfectomobile.com/rs/perfectomobile/images/why-apps-fail-infographic.pdf

10. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• Memory
• CPU
• Screen Rendering
• Battery Life
• Network Connectivity
Aspects of Performance
Testing

11. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Android Memory

12. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Android Memory
CRASH!!

13. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Garbage Collection in Logs
I/art: Explicit concurrent mark sweep GC freed 16519(1029KB) AllocSpace objects, 1(81KB) LOS objects, 14% free, 96MB/112MB, paused
1.660ms total 64.375ms
01-11 22:29:56.690 10222-10222/I/iceberg: Captain, I think we might have hit something.
01-11 22:29:57.544 10222-10222/I/iceberg: Captain, I think we might have hit something.
01-11 22:30:00.745 10222-10222/I/iceberg: Captain, I think we might have hit something.
01-11 22:30:01.233 10222-10247/I/art: Explicit concurrent mark sweep GC freed 17289(1157KB) AllocSpace objects, 1(81KB) LOS objects,
13% free, 102MB/118MB, paused 750us total 45.946ms
01-11 22:30:01.762 10222-10222/I/iceberg: Captain, I think we might have hit something.
01-11 22:30:04.105 10222-10222/I/iceberg: Captain, I think we might have hit something.
01-11 22:30:04.792 10222-10222/I/iceberg: Captain, I think we might have hit something.
01-11 22:30:05.908 10222-10247/I/art: Explicit concurrent mark sweep GC freed 9906(617KB) AllocSpace objects, 3(1121KB) LOS objects,
12% free, 108MB/124MB, paused 823us total 41.475ms
01-11 22:30:06.638 10222-10222/I/iceberg: Captain, I think we might have hit something.
01-11 22:30:07.288 10222-10222/I/iceberg: Captain, I think we might have hit something.
01-11 22:30:07.953 10222-10222/I/iceberg: Captain, I think we might have hit something.

14. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Android Memory
Eclipse MAT
Analyze Heap dumps
Leak Canary:
https://github.com/square/leakcanary
https://corner.squareup.com/2015/05/leak-canary.html
Square:
94% Drop in OOM
crashes!

15. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Live Demo

16. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Performance is a Key Update Feature

17. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Mobile Performance
Is Performance REALLY that important? Yes!
https://t.co/7bMT4A1PIt

18. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• AT&T’s Application Resource Optimizer
• Free
• Open Source
• iOS/Android (no root)
• Network traces on Device
• Grades against 25 Best Practices
• http://Developer.att.com/ARO
Testing Your App’s Network Performance

19. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• Cellular Networks are High Latency Environments
• Not Optimizing Your Content can lead to delays:
• 500ms:
• 26% frustration
• 8% engagement
• Amazon.com & Walmart:
• 100ms delay
• 1% revenue
• 4% of mobile users admit to throwing their phones
Mobile Apps Are Highly Network
Dependent
http://www.flickr.com/photos/9009139@N08/1263954439
http://blog.radware.com/applicationdelivery/applicationaccelerationoptimization/2013/12/mobile-web-stress-the-impact-of-network-speed-on-emotional-engagement-and-brand-perception-report
http://www.mobilejoomla.com/mobile-joomla-blog/172-responsive-design-vs-server-side-solutions-infographic.html

20. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Mobile Networks Drain Battery
• Data Connections account for:
• 40% of battery use (screen on)
• 70% screen off

21. ARO Speed
• Android VPN Trace Collection
https://pixabay.com/en/phone-smatphone-android-vector-804792/
https://commons.wikimedia.org/wiki/File:Man_made_communication_tower.svg
VPN

22. ARO Speed
• Android VPN Trace Collection
VPN
Werner Heisenberg:
Observer effect:
Measurements of a system
cannot be made without affecting
the system
ARO 4.1 had significant latency
(10-100ms per round trip)
ARO 5.0 only 1-2ms added per
round trip.

23. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Live Demo of ARO

24. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• sh arocli.sh --startcollector vpn_android --output
/Users/Demo/AROcli5 --video yes
• sh arocli.sh --analyze /Users/demo/AROcli5 --output
/Users/demo/AROcli5/out.html --format html
• sh arocli.sh --analyze /Users/demo/AROcli5 --output
/Users/demo/AROcli5/out.json –format json
But – What About Automated Testing?

25. ARO Integration into your CI testing
Automated test
ARO –startcollector
Stop
ARO–analyze
Build
Reports
Performance!
Deploy

26. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
HTTPS Traffic
Test data through a proxy:
Charles or MITMProxy
Decrypts all the data
COMING SOON to ARO.

27. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
© 2016 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T
affiliated companies. All other marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or
warranty by AT&T and is subject to change. Mention of a specific company or entity is not an endorsement by AT&T.
https://www.flickr.com/photos/jaumescar/8793922986

28. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
https://upload.wikimedia.org/wikipedia/commons/1/10/Florida_Gopher_Tortoise.jpg
© 2016 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All
other marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change.

29. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
© 2016 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All
other marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change.
Mention of a specific company or entity is not an endorsement by AT&T.

30. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
http://bit.ly/HighPerfAndroidApps

31. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
PubConf.io

32. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Q&A
https://www.charlesproxy.com/
https://mitmproxy.org/
http://developer.att.com/application-resource-optimizer
http://bit.ly/HighPerfAndroidApps
https://github.com/square/leakcanary

33. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
AT&T DriveMode
https://en.wikipedia.org/wiki/Texting_while_driving#/media/File:Notextinganddriving
WestUTX.JPG

34. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
AT&T DriveMode - 2013
Good Idea
Stop Device from receiving phone calls and
SMS when the phone is in a car > 25 MPH
Route to Voicemail/ Send SMS reply “I’m
Driving.”
Poor Implementation
Google Play reviews:
excessive battery drain
40

35. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
AT&T DriveMode for Android - 2013
3 min
480 GPS connections/24hr
~20% Battery
Good Idea
Poor Implementation
Fix bug:
App was going into “drive mode” when not
driving.

36. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
AT&T DriveMode for Android
Use activity APIs to identify when your users are in motion
11 minute trace
DetectedActivity.IN_VEHICLEDetectedActivity.ON_BICYCLE:DetectedActivity.ON_FOOT:
http://commons.wikimedia.org/wiki/File:Baby_goats_jan_2007_crop.jpg
http://commons.wikimedia.org/wiki/File:Goat_in_a_car.jpg
http://commons.wikimedia.org/wiki/File:2009_goat_and_bicycle_in_India_6512003001.jpg

37. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
“Its déjà vu all over again.”
• Yogi Berra
AT&T Drive Mode – iOS (2014)
https://commons.wikimedia.org/wiki/File:Yogi_Berra_1956.png
New application is getting poor reviews
in app store for battery drain

38. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
AT&T Drive Mode - iOS
Good Idea
Poor Implementation
Collect Analytics

39. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
AT&T Drive Mode - iOS

40. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
AT&T Drive Mode - iOS

41. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• Excessive Battery Drain
• Android
• Long background testing
• iOS
• Network trace while driving
• Test!
AT&T Drive Mode
Similar Symptoms - Different Culprits

42. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Streaming Radio App

43. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Streaming Radio App

44. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Streaming Radio App

45. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Streaming Radio App
DATA:
45% metadata
15% Images
<40% of data consumed is Music!
Good Idea
Poor Implementation
Critical KPI – report what is playing on
other “channels” with 10s accuracy.

46. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Streaming Radio Metadata

47. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Metadata
DATA:
18% metadata
20% Images
~60% of data consumed is Music!

48. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• Ensure you have Gzip enabled in your app, and on
your server.
• Cache files
• Send only changes
Streaming Music Metadata

49. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Music Streaming –Album Art
Good Idea
Poor Implementation
Use a CDN to host all Album Art
API call uses a 302 redirect to access image files
16 requests
8 API calls - 302 redirect
1.16s
8 CDN calls – download images
1.25s

50. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Redirects Add Latency
115s of added latency
~10% of test

51. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• Have API retrieve the image and send to the device
• Eliminate request
• Eliminate several RTs
Redirects add Latency

52. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Broken Links
21% of redirects have no target

53. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
Track Movement
• New version:
• 18x more connections than this app’s architecture team expected
• The triage team discovered that IP/port collisions = loss in sales
Good Idea
Poor Implementation
• Connecting to the network every 5 seconds –
• reusing the same connection
Created a new connection every 5s

54. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
World Famous
Goat Racing
Was $79, Now
$39
User has to wait for
image to load
Image Usage
Downloading the same image twice, in
different sizes, doesn’t make sense.
Download it once and use it in multiple ways.
54 kb
198 kb
World Famous
Goat Racing
Was $79, Now
$39
Good Idea
Poor Implementation
App with Rich image usage

55. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other
marks contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a
specific company or entity is not an endorsement by AT&T.
• Apps with Multiple & Frequent updates:
• Dial in usage
• Squash Bugs
• Improve Performance
• Testing!
Killer App

56. © 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks
contained herein are the property of their respective owners. Information contained herein is not an offer, commitment, representation or warranty by AT&T and is subject to change. Mention of a specific company or
entity is not an endorsement by AT&T.
Thank You