Performance
Why a page loads slowly and what makes it fast, measured rather than guessed.
Articles
Everything I have written on performance.
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Images
Images are the only area of a website where accessibility, loading time and search engine optimisation hang on the same adjusting screws.
Read the article “Images” -
Images: weight and format
The largest item in page weight and the easiest one to shrink.
Read the article on image weight and format -
Third-party code on your site
On an average website a whole lot of code runs that does not come from there.
Read the article “Third-party code on your site” -
Does your site's JavaScript actually work?
A WordPress site quickly runs a dozen JavaScript libraries: one for the slider, one for the lightbox, one for the scroll animations, one for the form.
Read the article “Does your site's JavaScript actually work?” -
Page speed and Core Web Vitals
What LCP, CLS and INP measure, why lab and real life differ and what improves page speed the most.
Read the article on page speed and Core Web Vitals -
What WordPress loads without you needing it
You have cleared out your plugins.
Read the article “What WordPress loads without you needing it” -
Web fonts
Why fonts belong on your own server and how they load fast and stay visible.
Read the article on web fonts -
Too many plugins
Why every unneeded plugin costs loading time, security and maintenance, and how to clear out the list.
Read the article on too many plugins