Tail Scale

🫧 Open on Bubbles "Our p99 is fine" and "one user in six has a bad time" are the same sentence. We rarely hear it that way, and in this post I wanted to go through why that can be. tail-scale is a small browser tool, a toy, for visualizing the tail-at-scale effect: the way a rare slow call stops being rare once a web page, a phone screen, or a service waits on enough of them. It's a single standalone HTML file running an in-browser Monte-Carlo simulation of serial and parallel fanout effects. You can downlo