Promise Pool Ext

Queue promises into a pool with configurable concurrency, timeout, and debounce. Latest v4.0.1 (2024) is ESM-only, requires Node >= 20. Provides Pool (limiting concurrency), PoolManager (ordered task execution with dependencies), and SeqWorker (sequential queue). Differentiators: sequential worker with debounce, dependency-aware PoolManager, and collective rejection behavior on first error.