We should use both dns-prefetch and preconnect (separately) to speed up connexions to additional servers in most browsers:
Seriously, do we need yet another version of Low Quality Image Placeholders?
Why do some people want to do additional work just to show useless colourful pixels to users, delaying the rendering of the actual image?
As a user, I hate LQIP. Single colour backgrounds are fine, though.
Looks like Google likes it when we start improving websites performance! 🚀
According to the results presented above, we can conclude that JXL is the superior format for both lossy and lossless operations. That is clear by only looking at the results, but we can also have a look at the features of each format. Some of them are very important.
Today: we finaly have a Pro account on WebPageTest so we'll be able to use all Opportunities & Experiments! 🥳
Also today, in WebPageTest header: "Notice: WebPageTest's user account services are currently experiencing issues." 😭
Why you need to know your site's performance poverty line (and how to find it)
The performance poverty line is the plateau at which changes to your website’s rendering metrics (such as Start Render and Largest Contentful Paint) cease to matter because you’ve bottomed out in terms of business and user engagement metrics.
Tammy Everts