WordPress
Fifteen years of WordPress, written down. Blocks, queries, performance, and the parts of the codebase everybody works around instead of reading.
WP_Query is fast until it is not
WordPress will happily let you write a query that scans a million meta rows. Here is which arguments are expensive, why, and what to do instead.
Block themes, a few years in: what I was wrong about
I resisted block themes for a long time and I was mostly wrong. Here is what changed my mind, and the two things I would still not hand to a client.