The **@libp2p/tracked‑map** package provides a drop‑in `Map` implementation that automatically reports its size to libp2p’s metrics subsystem, enabling real‑time collection of collection‑related statistics while a libp2p node is running. It is intended for developers building libp2p applications or libraries who want built‑in metric tracking without handling it manually; when metrics are disabled it simply behaves as a normal JavaScript `Map`.