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OTA13 - Jon Arne S: Mobile Web Performance

Published on Thursday, October 3, 2013

OTA13 - Jon Arne S: Mobile Web Performance

With Over the Air 2013 coming to a close last Saturday, I took some time to reflect on some of the more memorable talks given over the two-day event. Mobile and web performance guru Jon Arne Sæterås' presentation was particularly informative, and inspired me to write a quick summary for people that did not get the chance to see it live in person.

Web on Mobile is Slow

Slow websites offer very poor user experiences. With businesses such as Amazon and Bing seeing direct revenue impact when improving web performance. So why is the web slower on mobile devices? Some reasons include:

Mobile issues:

  • Processing power
  • Browser
  • Battery preserving strategies

Network issues:

  • Network latency
  • Available bandwidth

The above problems are also plagued by poor implementation & design of websites and mobile solutions.

The Current State of the Web and Mobile

The average web page weighs around 1.6MB with around 94 requests. This equates to an average download speed of around 6.7 seconds. This takes around 10.6 seconds on average to load when you include the rendering time in the browser, the server response time, the radio wake up and also the actual download of the page itself.

What Our Current Solution Involves

Most web designers and developers are moving their focus to a technique called Responsive Web Design. This technique involves using media queries to create a content layout that works well on all screen sizes.

Over 72% of responsive websites are the same size as their desktop counterparts, meaning mobile users on average are forced to download 1.6mb of data through their mobile network.

Responsive Web Design ? Mobile Friendly

The BBC rebuilt their much loved mobile website using responsive techniques. This caused a large increase in size and loading times, which many users were very vocal about on their comments section.

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Author: Joe Davine

Categories: Development, Opinion

Tags: Performance , Mobile , Web

Joe Davine
Joe Davine>

Joe Davine

Marketing Executive for 51Degrees.mobi

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