In the third part of this series I described how to squeeze more performance out of your site by optimizing the static media files. This month, a month later than expected due to a minor family emergency, I'll talk about putting the finishing touches which make your site more polished and professional. They mostly have to do with how your site interacts with search engines and social networks but there's also a little bit of performance to be found in there.
In the first part of this series I described why tuning the performance of your site is something you should do for both philosophical and practical reasons, as well as where to start. That post was by necessity a bit generic. In the second part of this series we'll dive into some of the basic things you can do in Joomla to unlock a decent amount of performance.
Joomla 4 is a major improvement over Joomla 3. Right out of the box you get a very fast CMS with built–in support for structured data (what was formerly called “microdata”), even several caching options to cater for any use, from lightweight persona sites to massive, busy portals.
With the change in Google’s site rating and ranking criteria, the reasonably new “Web Vitals” measurements have generated new interest in a variety of caching technologies to improve content delivery times in the never ending race to the elusive “100% across the board” and satisfactory search engine indexing results.
Joomla 4 performs exceptionally well out of the gate on Google Lighthouse at Joomla Australia's Virtual User Group. Google Lighthouse is Google's open-source, automated tool that gives you feedback that you can use to improve the quality of web pages. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, SEO and more.
With this article I would like to follow up on that topic with the current status of lazy-loading in the core as well as how to use it in 3.x today already.
Were you ever curious about why large websites load their pages quicker. Sure, they have high performance dedicated servers, but they also use a globally distributed network called Content Delivery Network (CDN). This article will introduce you to the concept of CDN, how it works and how it can be configured on a Joomla website or in other words how to perform a Joomla CDN integration to help improve website content delivery speeds and reduce latency.