Tag

core web vitals

LCP, INP and CLS: what each one actually measures, which of them your users notice, and how far a single fix moves them.

16 posts1 authorLast post 2 days ago

The image formats worth the conversion cost

AVIF is smaller, slower to encode, and not always the right answer. Here is where each format earns its place.

chrisMarch 28, 20261 min read

Teams optimise the hero image for a fortnight and discover the LCP element was a paragraph of text the whole time.

chrisMarch 4, 20261 min read

A lazy attribute on the hero image delays the one thing the metric is measuring.

chrisFebruary 20, 20261 min read

Lab numbers start arguments. Field numbers end them, because nobody can claim the lab was configured wrong.

chrisJanuary 15, 20261 min read

It is almost always one of four things, and only one of them is your fault.

chrisJanuary 3, 20261 min read

Stop arguing that it matters in general. Show what it costs here, on this page, this quarter.

chrisDecember 10, 20251 min read

Three options, in descending order of how much the marketing team will like them.

chrisNovember 16, 20251 min read

Four numbers, one trend line each, and a decision about whether to move the tripwire. That is the whole meeting.

chrisJuly 19, 20251 min read