@parcel/reporter-tracer is a Parcel plugin that adds tracing capabilities to the bundling process. It allows developers to visualize the time spent in different phases of Parcel, aiding in performance bottleneck identification. The reporter generates a trace file consumable by tools like Chrome's tracing panel, enabling a detailed analysis of build times and optimization opportunities. This package provides invaluable insight for debugging performance-related issues in Parcel-based projects.