The Importance of Page Speed (Sources)

The Importance of Website PerformanceLately in some of my writing projects I’ve had to hunt down sources to demonstrate the importance of web page speed. Usually a quick Google search will pull up some pretty good ones, and I have a few others on file that I can refer to.

I thought I would put together a roundup of some of the ones I’ve been able to find. Web development bloggers, who are constantly promoting the importance of web page speed, should have these types of authoritative sources at their fingertips.

So consider this post the collective evidence for the importance of page speed. Posts are listed from oldest to newest.

If you know of any other good sources that discuss why page speed matters, add them to the comments and I’ll continually update this post. And keep in mind, these are sources that show why page speed matters not how to make pages faster.

So if you’re heading to a client meeting or want to discuss with your boss why it’s wrong to polyfill some CSS3 or HTML5 feature so it works in IE6/IE7/IE8, this might be a good way to show the potential effects of slowing down the slowest browser.

16 Responses

  1. Thanks for this, really useful information.

  2. Dig the roundup of articles. Before I finished the redesign/re-engineering of my site, I grabbed the PageSpeed addition to Firebug and heeded it’s warnings. After quite a few hours of optimizing the front-end scripting and server output, I managed to get PageSpeed scores of 90-95.

    Now we do the same for client sites. It’s tough to gauge the true ‘experience’ from a user/visitor’s perspective, but average visit times have increased, perhaps owing to the speed not being a distraction (i.e. when it was slower).

  3. Dan:


    You may find this article and infographic interesting;


  4. Emma:

    Thanks, these are really useful links and some helpful advice for shrinking load times. I know its important to cater for the slowest but I still feel like should design for the fastest – survival of the fittest! If you can’t keep up, get out the race… or update your browser or your hardware! Wrong, I know, but everyone is entitled to an opinion.

  5. Thanks, very useful article :-) Good links, and a lot of information on shrink loading time. Unfortunatly, we do’nt have any good tip.

  6. As a long time web application developer I’ve found that working on a fast application lets me work so much faster. The faster I can load up and get to a page, the faster I can make changes on it or fix bugs, etc. Maintaining a slow application just slows everything down, testing, development, etc.

  7. Very applicable content! There are many times where I am very frustrated by slow sites. Many people are unwilling to spend the extra cash to ensure speed, but it is ultimately worth it when it comes to web design and general website formation!

  8. thank you for this Article

    Very good website !

  9. A relevant list by Steve Souders:

    Performance Tools

  10. the faster your site – the higher it will be in search engine results – so… it always make sense to minify your js

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