P-map and P-limit packages offer utility libraries for handling promises efficiently. P-map allows creating an array of promises to process multiple files concurrently, executing a set number of promises at a time. This concurrent mapping method is more efficient than chunking because it continuously processes a set number of promises at a time and triggers a new one as soon as a spot becomes available. These packages have proven more effective than using async JS for callback-based architecture, providing robust functionality between promises, promise.allSettled, and helper functions.