Thursday, November 15, 2012
The final part of the talk was about web page performance. He showed an overview of experiments by Google, Yahoo and Bing of how slower performance directly impacts page usage. The same experiment was used in tuesday's talk on "Faster Websites".
He introduced us to webpagetest.org. It's an online webpage analysis that shows how the page is loaded and runs some tests to see if you're using best practices for good performance. I think the Pagespeed Insights plugin for Chrome gives more info. Running webpagetest.org against www.thomsonreuters.com results in a score of 53/100 with room for improvement in compressing content, caching static content and use of CDN.
Using CDN would increase cache reuse for static files like jquery.js by not serving it yourself, but using a public server. He did note that using CDN could imply security risks, because you have no control over what version of a file resides in the users cache.
In the end this was an entertaining talk with some nice things to keep in the back of your head.