In a busy year for Prometheus, 2020 saw significant developments, including the introduction of the Grafana Agent, which is optimized for Grafana Cloud and reduces memory usage by up to 40% compared to traditional setups. Prometheus v2.19 introduced memory-mapping for reduced memory usage and faster restarts, while v2.20 expanded service discovery features. The year also focused on revisiting design decisions, improving backfill methods, and enhancing recording rules to retroactively apply rules for faster queries. Additionally, Grafana Labs launched Grafana Enterprise Metrics, a scalable Prometheus-compatible service tailored for large organizations. As the year concluded, the Prometheus team accepted the Grafana Agent code donation, setting the stage for further collaboration and innovation in 2021.