fastq

fastq is a high-performance in-memory work queue for JavaScript and Node.js applications. It runs tasks through a worker function while enforcing a configurable concurrency limit. Both traditional callback workers and Promise-based async workers are supported. Tasks can be added to either the front or back of the queue depending on scheduling needs. Processing can be paused, resumed, emptied, or terminated while exposing the current queue length and idle state. Hooks report conditions such as drain, saturation, empty queues, and task errors. TypeScript definitions are included, and the package is designed to provide queue management with very little performance overhead.