Projects sharing features with P Map

Run promise-returning & async functions a specific number of times concurrently

Limit the execution rate of a function

Compose promise-returning & async functions into a reusable pipeline

While a condition returns true, calls a function repeatedly, and then resolves the promise

co is a JavaScript generator control flow library and non-blocking workflow engine. It manages asynchronous logic by using generators and promises to simulate a synchronous coding style. The project transforms generator functions into standard functions that return promises, ensuring compatibility with non-generator interfaces. It also functions as a promise-based asynchronous orchestrator that executes multiple operations concurrently through the recursive resolution of nested promise collections. The library provides high-level primitives for asynchronous flow control and non-blocking work

Convert an Observable to a Promise

RxJS is a library for reactive programming that provides a framework for composing asynchronous and event-based programs. It utilizes observable sequences to model data flows, allowing developers to manage complex sequences of events through a declarative programming interface. The library implements the observer pattern to facilitate decoupled communication between data producers and subscribers. By employing a lazy execution model, streams remain dormant until a consumer explicitly subscribes, at which point data production is triggered. This approach enables the construction of predictable

Memoize promise-returning functions. Includes cache expire and prefetch.

Iterate over promises serially

p-queue is a JavaScript promise queue and concurrent task scheduler designed to limit the number of active asynchronous operations. It serves as an asynchronous rate limiter and promise lifecycle manager to prevent resource exhaustion. The project distinguishes itself through priority-based task scheduling and token-bucket rate limiting to control execution frequency. It integrates with abort signals for task cancellation and provides mechanisms to pause, resume, and clear pending operations. The tool covers broader traffic management capabilities including operation timeouts and concurrency

Run promise-returning & async functions concurrently with optional limited concurrency

Run multiple promise-returning & async functions with limited concurrency

q is a JavaScript promise library and asynchronous flow controller designed to manage non-blocking operations. It serves as a system for coordinating parallel tasks and sequencing asynchronous workflows through task chaining and error propagation. The library distinguishes itself with specialized debugging tools that capture long stack traces across asynchronous jumps and monitor unhandled rejections to prevent silent failures. It also functions as a remote object proxy, forwarding method calls to remote targets and routing responses back through promises. The project provides comprehensive

Transform the first chunk in a stream

promise semaphore

An async control-flow library that makes stepping through logic easy.

promise-nodeify

Modernize node.js to current ECMAScript specifications! node.js will not update their API to ES6+ for a while. This library is a wrapper for various aspects of node.js' API.

Node-core streams for userland

Line-by-line Stream reader for node.js

High-level streams library for Node.js and the browser

:loop: Calls a function repeatedly until a condition returns true and then resolves the promise

Same as mz, but wrap many popular modules rather than core API.

Convenience wrapper for ReadableStream, with an API lifted from "from" and "through2"

Beautiful concurrency for JavaScript