Landscape from Cuba

Serving optimized, responsive images

Recently I’m fairly busy with Udacity’s Mobile Web Specialist nanodegree and diving deeper in photography, but let’s find some time to show the benefits of responsive images via a working and downloadable example. When serving images you want to make sure the image resizes nicely (responsive) and it’s as small as possible without affecting quality (optimized). Not saying I always do it, especially with CMSs it can be overwhelming to save those few bytes, but it’s still important both for your users and for your SEO.



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PageSpeed Insights: An error occurred while fetching or analyzing the page

I’ve seen this happening before for large websites, apparently the Google PageSpeed Insights rendering times out for some large websites with many assets (>200). But talented I am, I’ve managed to break it with my tiny 600kB blog with 17 resources. After reaching around 60% on load/analyze, I got the the not-so-helpful message:

An error occurred while fetching or analyzing the page

Eventually found the solution, which was rather unexpected.



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