Next month, I'll be hosting 2 or 3 discussions of David Rowley's talk, Writing fast C code for a modern CPU (and applying it to PostgreSQL), given at 2025.pgconf.dev (talk description here). If you're interested in joining us, please sign up using this form and I will send you an invite to one of the sessions. Thanks to David for agreeing to attend the sessions. As usual, nobody is too inexperienced to join us, and nobody is too experienced. We have everyone from total newcomers to interested committers.