Image by Jean Scheijen
Website performance is one of the most neglected areas of web design and development. Due to increase in hardware performance and bandwidth, it is now a common thing to have a single page ‘weigh’ 2 MB or more, with even more downloaded asynchronously with AJAX and other technologies.
This is wrong for several reasons.
- User experience – if the system responds to user interaction in about 0.1 sec. the user perceives that as instantaneous interaction as if they are working directly with the content. 1 sec. is the limit of user’s flow of thought to remain uninterrupted, although the user starts to ‘feel’ the application sitting between them and the content. After the 10 sec. mark is passed, the user loses focus on the interaction and starts to do other things while waiting. (via Jacob Nielsen)
- Mobile users – 2G / 3G is nowhere near to your home speeds. Majority of traffic is now mobile, most of the time over cellular networks.
- Roaming – data charges abroad can be a serious expense for your visitors.
- Search Engine Optimization – Google favors faster performing sites in Search results listings.
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