performance engineering 
Coordinated Omission: Why Your Latency Numbers Lie
Most HTTP benchmarking tools quietly hide tail latency when the server slows down. The phenomenon is called coordinated omission, it shows up almost exclusively in p99 and beyond, and it has caused production incidents at organisations that thought their load tests were green. This post explains the mechanism, demonstrates it empirically with a reproducible benchmark of eight tools across five server pathologies, and shows how to fix it with a constant arrival-rate workload model.
A Performance Engineer's Library
An annotated bibliography of books, talks, blogs, podcasts, and academic resources for the practising performance engineer — covering systems performance, observability, capacity planning, and software performance engineering. The textual companion to the Awesome Performance Engineering tool list.