dotMobi analysis shows strong correlation between mobile web site speed and global reach

Results point to weight problem for many on the mobile internet – including Apple

dotMobi, an expert in mobile web technology, recently performed research on the top 100 sites as ranked by Alexa to analyze the weight of pages they serve to their mobile users. The results showed that companies with a high global reach were most likely to serve lightweight versions of their content, by adapting their websites according to the accessing device. What differentiates the big players from the rest of the pack is that they take performance, speed and optimization of their web content very seriously.

By emulating the web experience on several well known devices, dotMobi was able to model page weights served on a representative spread of device types from high end to low end including desktop.

Using this information dotMobi calculated a ratio for each company of how much content adaptation takes place. The results show that many of the top companies on the web have a high ‘dynamic range’ – a ratio of the heaviest page to the lightest page served. Amazon for example had a dynamic range of 154, showing a large amount of content adaptation happening across devices.

At the other end of the spectrum, Apple has a dynamic range of just 1, showing that it serves the same content to all devices irrespective of that device’s capabilities. Typically, higher page weights slow down experiences on mobile where connectivity and processing power are not guaranteed.

Website Dynamic Range Smallest  Size (KB) Largest  Size (KB)
1. 40 8 305
2. 34 7 241
3. 21 24 517
4. 13 34 444
5. 9 8 68
6. 1 100 100
7. 55 5 271
8. 5 478 2,271
9. 154 14 2,131
10. 37 40 1474










dotMobi tested  the top sites by emulating devices  including iPhone, Blackberry 8520, Nokia 6300, Blackberry 8520, and Chrome for desktop.

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Posted on Date:
Monday, April 22, 2013