p-map
Map over promises concurrently with configurable concurrency, error handling, and abort control.
What is p-map?
p-map is a JavaScript utility library that allows developers to map over promises or async functions concurrently with configurable concurrency limits. It solves the problem of running multiple promise-based operations in parallel while maintaining control over resource usage and error behavior, offering more flexibility than native `Promise.all()`.
Node.js and JavaScript developers who need to execute multiple asynchronous operations in parallel with precise control over concurrency, error handling, and cancellation.
Developers choose p-map over native alternatives because it provides essential concurrency controls like limiting parallel executions, customizable error handling (stop-on-error vs. collect-all-errors), abort capabilities via AbortController, and streaming iterable support—all in a lightweight, focused package.
Overview
Map over promises concurrently
Use Cases
Best For
- Limiting concurrent API calls to avoid rate limiting
- Processing large datasets with async operations without overwhelming system resources
- Implementing robust error handling in batch async operations
- Creating streaming data pipelines with backpressure control
- Adding cancellation support to concurrent promise-based workflows
- Building async iterators that process items concurrently
Related Projects
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p-limitRun multiple promise-returning & async functions with limited concurrency
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