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What Makes Mobile Websites Tick?
How Do We Make Them Faster?
Insights from WebPagetest and HTTPArchive
@dougsillars, AT&T
...
Why Mobile Web?
85% of survey respondents said mobile
devices are a central part of everyday life.
© 2014 AT&T Intellectua...
Why Mobile Web?
• >50% of US e-commerce web traffic is mobile
• Google: >50% of searches come from
smartphones
© 2014 AT&T...
Why Mobile Web?
In the 2014 Holiday Season:
• 60% of Amazon and Target customers
shopped with a mobile device.
• On Cyber ...
But, all is not Rosy:
• Study: 60% of consumers Most Frustrated by
“web pages loading slowly or not at all”
• Facebook: “A...
DATA:
– Add 160KB to a page:
Bounce rate +12% on mobile
SPEED:
– 40% exit a site if > 3s load time
– 64% expect a site to ...
Website Performance – webpagetest.org
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are t...
SpeedIndex Measure of Visual Performance
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo ar...
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Propert...
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Propert...
How Mobile Data is Collected
• Scans ~5,000 mobile URLs twice a month
• Mobitest agent running on iPhone 4 running
iOS 5.1...
Challenge of HTTP Archive Data
• Sites outside US incur extra latency
– affects timings (requests & page size less
affecte...
Improve the Testing
• Run top 1,000 sites on Motorola G (KitKat) in
Dulles, VA.
• Andy Davies’ Google Docs Sheet
– Require...
Test Setup
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellect...
Souders’ Laws of Fast Websites
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademar...
How Many Requests Do Mobile Pages Make?
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are...
How Many Requests Do Mobile Pages Make?
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are...
U.S. “News” Site
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Int...
Speed Index vs.Request Count
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks...
Speed Index vs.Request Count
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks...
Souders’ Laws of Fast Websites
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademar...
U.S. “News” Site
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Int...
How Big are Mobile Pages?
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of...
Speed Index vs Page Size
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of ...
Enormous Mobile Sites Cost $$
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademark...
Enormous Mobile Sites Cost $$
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademark...
Speed Index vs Page Size
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of ...
Redirects are a Mobile Killer
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademark...
Souders’ Laws of Fast Websites
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademar...
Low Byte Count
• Long TTFB
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks o...
Low Request and Byte Count
• Multiple scripts
• Head of line
blocking
© 2014 AT&T Intellectual Property. All rights reserv...
So What Makes a Site Very Fast?
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are tradema...
Sites with SpeedIndex < 2000
• <5 Requests to load page
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and t...
Souders’ Laws of Fast Websites
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademar...
Load Important Stuff First
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks o...
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Propert...
Pages Are Still Getting Bigger
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademar...
Our Base Page Isn’t Changing Much
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trade...
JavaScript Has Grown 25% in 12 Months
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are t...
CSS has Grown By 20%
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T...
Images are Bulk of Download
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks ...
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Propert...
Fonts – 200% Growth in 12 Months
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are tradem...
Most Pages Don’t Use Fonts
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks o...
Mobile Design: RWD vs. Mobile Redirect
• Responsive Web Design (RWD) One site for all
screens
– Media Queries change layou...
RWD
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Pro...
Mobile Specific Sites
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&...
Mobile Specific Vs. RWD
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of A...
In Summary
• Reduce Requests
– Quantity and Size
– HTML, CSS, JavaScript, and Fonts are crucial to
optimize
• Optimize cri...
You too can explore this
Download the raw data:
http://mobile.httparchive.org/downloads.php
Or explore it in Big Query:
ht...
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Propert...
© 2015 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other marks contained herein are trade...
© 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Propert...
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Mobile Web Performance using WebPageTest and HTTPArchive

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Looking at recent data from the HTTP Archive and WebPageTest to look at what mobile web developers are doing right, and what they are doing wrong.

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Mobile Web Performance using WebPageTest and HTTPArchive

  1. 1. What Makes Mobile Websites Tick? How Do We Make Them Faster? Insights from WebPagetest and HTTPArchive @dougsillars, AT&T @andydavies, NCC Group © 2015 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  2. 2. Why Mobile Web? 85% of survey respondents said mobile devices are a central part of everyday life. © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. http://blogs.salesforce.com/company/2014/02/mobile-behavior-report.html
  3. 3. Why Mobile Web? • >50% of US e-commerce web traffic is mobile • Google: >50% of searches come from smartphones © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. http://marketingland.com/mobile-drives-nearly-half-e-commerce-traffic-pc-still-rules-sales-report-118629 http://searchengineland.com/its-official-google-says-more-searches-now-on-mobile-than-on-desktop-220369
  4. 4. Why Mobile Web? In the 2014 Holiday Season: • 60% of Amazon and Target customers shopped with a mobile device. • On Cyber Monday, Amazon sold 18 toys/second via mobile. © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. http://phx.corporate-ir.net/phoenix.zhtml?c=176060&p=irol-newsArticle&ID=2002024
  5. 5. But, all is not Rosy: • Study: 60% of consumers Most Frustrated by “web pages loading slowly or not at all” • Facebook: “Articles shared by users average 8 seconds to load – by far the slowest single content type on Facebook.” © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. http://www.marketwired.com/press-release/survey-mobile-broadband-performance-expectations-higher-than-ever-even-as-more-operators-2052324.htm http://media.fb.com/2015/05/12/instantarticles/
  6. 6. DATA: – Add 160KB to a page: Bounce rate +12% on mobile SPEED: – 40% exit a site if > 3s load time – 64% expect a site to load in < 4s © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Why Mobile Performance? 4% of mobile users admit to throwing their phones out of frustration from slow sites! http://laraswanson.com/mobileweb/ http://www.flickr.com/photos/9009139@N08/1263954439 http://www.mobilejoomla.com/mobile-joomla-blog/172-responsive-design-vs-server-side-solutions-infographic.html
  7. 7. Website Performance – webpagetest.org © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  8. 8. SpeedIndex Measure of Visual Performance © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Speed Index (Top) = 1200 Speed Index (Bottom) = 9000
  9. 9. © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  10. 10. © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. http://mobile.httparchive.org
  11. 11. How Mobile Data is Collected • Scans ~5,000 mobile URLs twice a month • Mobitest agent running on iPhone 4 running iOS 5.1.1 located in Dulles, USA • Network profile (simulated 3G network) – 1.6Mbps download, 768Kbps upload, 300ms RTT © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  12. 12. Challenge of HTTP Archive Data • Sites outside US incur extra latency – affects timings (requests & page size less affected) • iOS test agent is old and misses some metrics e.g. TTFB • Data is noisy © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  13. 13. Improve the Testing • Run top 1,000 sites on Motorola G (KitKat) in Dulles, VA. • Andy Davies’ Google Docs Sheet – Requires WPT private instance (or key to public instance) – Run took ~ 2 days © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. http://calendar.perfplanet.com/2014/driving-webpagetest-from-a-google-docs-spreadsheet/
  14. 14. Test Setup © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Read data into HTTPArchive format SQL database Run HTTPArchive to collect all of the data into the database (overnight script) Begin querying the data
  15. 15. Souders’ Laws of Fast Websites © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Rule 1 - Make Fewer HTTP Requests Rule 2 - Use a Content Delivery Network Rule 3 - Add an Expires Header Rule 4 - Gzip Components Rule 5 - Put Stylesheets at the Top Rule 6 - Put Scripts at the Bottom Rule 7 - Avoid CSS Expressions Rule 8 - Make JavaScript and CSS External Rule 9 - Reduce DNS Lookups Rule 10 - Minify JavaScript Rule 11 - Avoid Redirects Rule 12 - Remove Duplicate Scripts Rule 13 - Configure ETags Rule 14 - Make AJAX Cacheable
  16. 16. How Many Requests Do Mobile Pages Make? © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Number of Requests Frequency 70% < 100 Requests 6% > 200 requests
  17. 17. How Many Requests Do Mobile Pages Make? © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Number of Requests Frequency
  18. 18. U.S. “News” Site © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. NOT OPTIMISED FOR MOBILE! September 11, 2015 1.6MB download 336 requests (down from 707) 96 (down from 202 domains!) First Byte .3s Start Render 15s SpeedIndex 18000
  19. 19. Speed Index vs.Request Count © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. • Reducing request count does not guarantee fast performance • Low Request Count – High SpeedIndex? • Sites from China and Russia • Tested in Washington DC • Major US Software Company • JS load takes 20s
  20. 20. Speed Index vs.Request Count © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. • Sites with many requests can have a low SpeedIndex • Independent.co.uk • Xda-developers.com >400 requests, yet SpeedIndex <10000
  21. 21. Souders’ Laws of Fast Websites © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Rule 1 - Make Fewer HTTP Requests Rule 2 - Use a Content Delivery Network Rule 3 - Add an Expires Header Rule 4 - Gzip Components Rule 5 - Put Stylesheets at the Top Rule 6 - Put Scripts at the Bottom Rule 7 - Avoid CSS Expressions Rule 8 - Make JavaScript and CSS External Rule 9 - Reduce DNS Lookups Rule 10 - Minify JavaScript Rule 11 - Avoid Redirects Rule 12 - Remove Duplicate Scripts Rule 13 - Configure ETags Rule 14 - Make AJAX Cacheable
  22. 22. U.S. “News” Site © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. http://www.webpagetest.org/domains.php?test=150911_8M_AJJ&run=3&cached=0 Requests made to 96-202 Domains 16 domains > 10 requests each 25% of domains have 2 requests 42% of domains have just 1 request
  23. 23. How Big are Mobile Pages? © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. 46% under 500 KB 91% under 2MB 87 mobile sites over 3MB
  24. 24. Speed Index vs Page Size © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Outside US Seriously?
  25. 25. Enormous Mobile Sites Cost $$ © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. http://whatdoesmysitecost.com/test/150911_T3_GG0#p ppCost
  26. 26. Enormous Mobile Sites Cost $$ © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  27. 27. Speed Index vs Page Size © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. • 425 KB • 29 Requests • SpeedIndex >16000
  28. 28. Redirects are a Mobile Killer © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. • 425 KB • 29 Requests • SpeedIndex >16000 7.5 seconds before page load lost to redirects
  29. 29. Souders’ Laws of Fast Websites © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Rule 1 - Make Fewer HTTP Requests Rule 2 - Use a Content Delivery Network Rule 3 - Add an Expires Header Rule 4 - Gzip Components Rule 5 - Put Stylesheets at the Top Rule 6 - Put Scripts at the Bottom Rule 7 - Avoid CSS Expressions Rule 8 - Make JavaScript and CSS External Rule 9 - Reduce DNS Lookups Rule 10 - Minify JavaScript Rule 11 - Avoid Redirects Rule 12 - Remove Duplicate Scripts Rule 13 - Configure ETags Rule 14 - Make AJAX Cacheable If you Must redirect – CACHE your redirects:
  30. 30. Low Byte Count • Long TTFB © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  31. 31. Low Request and Byte Count • Multiple scripts • Head of line blocking © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  32. 32. So What Makes a Site Very Fast? © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. 21% SpeedIndex < 5,000 66% SpeedIndex <10,000 85% SpeedIndex <15,000
  33. 33. Sites with SpeedIndex < 2000 • <5 Requests to load page © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  34. 34. Souders’ Laws of Fast Websites © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Rule 1 - Make Fewer HTTP Requests Rule 2 - Use a Content Delivery Network Rule 3 - Add an Expires Header Rule 4 - Gzip Components Rule 5 - Put Stylesheets at the Top Rule 6 - Put Scripts at the Bottom Rule 7 - Avoid CSS Expressions Rule 8 - Make JavaScript and CSS External Rule 9 - Reduce DNS Lookups Rule 10 - Minify JavaScript Rule 11 - Avoid Redirects Rule 12 - Remove Duplicate Scripts Rule 13 - Configure ETags Rule 14 - Make AJAX Cacheable
  35. 35. Load Important Stuff First © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. 8 requests required to load page 97 requests for ads/analytics/trackers
  36. 36. © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Some worrying trends…
  37. 37. Pages Are Still Getting Bigger © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. 9/1/2012: 644kb 9/1/2013: 815kb 9/1/2014: 1020kb 9/1/2015: 1203kb
  38. 38. Our Base Page Isn’t Changing Much © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  39. 39. JavaScript Has Grown 25% in 12 Months © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. New Graph, same increase 2013-2014
  40. 40. CSS has Grown By 20% © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Was 33% last year 2013-2014
  41. 41. Images are Bulk of Download © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  42. 42. © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Lots of focus on HTML, CSS, JS and images but…
  43. 43. Fonts – 200% Growth in 12 Months © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  44. 44. Most Pages Don’t Use Fonts © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. 56% do not use custom fonts But 9 sites use > 500 KB
  45. 45. Mobile Design: RWD vs. Mobile Redirect • Responsive Web Design (RWD) One site for all screens – Media Queries change layout based on screen size • Mobile Specific: Server redirects to Specific Mobile Site © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  46. 46. RWD © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  47. 47. Mobile Specific Sites © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  48. 48. Mobile Specific Vs. RWD © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Mobile Specific RWD Delta Count 218 98 Total Requests 42 52 19% higher Total KB 474 893 47% higher SpeedIndex 9172 9138 0.4% FASTER Top 1,000 sites Moto G (KitKat) 2014 Top 1,000 sites Moto G (KitKat) 2015 Mobile Specific RWD Delta Count 171 98 Total Requests (median) 62 61 equal Total KB (median) 770 1,102 43% higher SpeedIndex (median) 8801 7746 13% FASTER
  49. 49. In Summary • Reduce Requests – Quantity and Size – HTML, CSS, JavaScript, and Fonts are crucial to optimize • Optimize critical rendering path • Mobile redirect vs. RWD: – Performance line is blurring on newer browsers/hardware © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  50. 50. You too can explore this Download the raw data: http://mobile.httparchive.org/downloads.php Or explore it in Big Query: https://www.igvita.com/2013/06/20/http-archive- bigquery-web-performance-answers/ http://bigqueri.es/ © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property.
  51. 51. © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Early Release… Includes: • Getting Started • Interpreting waterfalls • Scripting tests • Using the API • Continuous Integration • Private Instances http://bit.ly/usingwebpagetest
  52. 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.
  53. 53. © 2014 AT&T Intellectual Property. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Thanks Doug Sillars @dougsillars Andy Davies @andydavies
  • colinbendell

    Oct. 16, 2015
  • fabianlenczewski

    Sep. 22, 2015

Looking at recent data from the HTTP Archive and WebPageTest to look at what mobile web developers are doing right, and what they are doing wrong.

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