Daniel Lemire has a good reputation in the HN due to his work on simdjson and the Eisel-Lemire floating point parsing algorithm among others.
In other words, it's a known source that posts semi-regularly about pleasingly low-level and technical things, with authority and often including assembly code in the posts. Sweet.
For me it's an almost certain upvote, i.e. I'm glad that this got posted and already looking forward to the next one.