async vs p-queue vs bottleneck vs promise-queue vs queue-promise
JavaScript Concurrency Control Libraries Comparison
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asyncp-queuebottleneckpromise-queuequeue-promiseSimilar Packages:
What's JavaScript Concurrency Control Libraries?

Concurrency control libraries in JavaScript are designed to manage asynchronous operations efficiently, allowing developers to handle multiple tasks simultaneously while controlling the flow of execution. These libraries help in preventing issues such as callback hell, race conditions, and resource exhaustion by providing mechanisms for queuing, throttling, and limiting the execution of asynchronous functions. They are particularly useful in scenarios where API calls, file I/O, or other asynchronous tasks need to be managed effectively to ensure optimal performance and resource utilization.

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async65,085,06728,232808 kB1410 months agoMIT
p-queue9,739,2683,71740.6 kB475 months agoMIT
bottleneck4,159,9431,895-866 years agoMIT
promise-queue996,994229-107 years agoMIT
queue-promise14,2459229.2 kB13-MIT
Feature Comparison: async vs p-queue vs bottleneck vs promise-queue vs queue-promise

Control Flow

  • async:

    Async provides a rich set of control flow functions such as series, parallel, and waterfall, allowing developers to easily manage the execution order of asynchronous tasks. This makes it easier to handle complex workflows where the order of operations is critical.

  • p-queue:

    P-Queue offers a flexible queuing mechanism that allows you to manage the execution order of tasks based on priority and concurrency settings. This feature is beneficial when certain tasks need to be prioritized over others, ensuring efficient resource allocation.

  • bottleneck:

    Bottleneck focuses primarily on rate limiting rather than control flow, allowing you to set limits on how many times a function can be called over a specified time period. This is particularly useful for managing API requests and preventing overloading of resources.

  • promise-queue:

    Promise-Queue is designed for straightforward promise management, allowing tasks to be queued and executed in the order they were added. It simplifies the process of managing asynchronous tasks without complex control flow mechanisms.

  • queue-promise:

    Queue-Promise provides a simple promise-based queue that executes tasks in the order they are added, making it easy to manage asynchronous operations without additional features or complexity.

Rate Limiting

  • async:

    Async does not provide built-in rate limiting features, focusing instead on control flow utilities. Developers may need to implement their own rate limiting logic when using Async for tasks that require it.

  • p-queue:

    P-Queue does not have built-in rate limiting features but allows you to manage the concurrency of tasks, which can indirectly help in controlling the rate of execution based on the number of concurrent tasks allowed.

  • bottleneck:

    Bottleneck excels in rate limiting, allowing you to specify the maximum number of executions per interval, as well as the ability to queue excess calls until they can be executed. This is ideal for API interactions where you need to adhere to rate limits.

  • promise-queue:

    Promise-Queue does not include rate limiting capabilities, focusing instead on queuing and executing promises in order, making it suitable for simpler use cases without the need for rate control.

  • queue-promise:

    Queue-Promise does not offer rate limiting features, as it is designed for basic promise queuing and execution without additional constraints.

Ease of Use

  • async:

    Async has a steeper learning curve due to its extensive feature set and various control flow functions. Developers may need to spend time understanding its API to utilize it effectively for complex workflows.

  • p-queue:

    P-Queue is user-friendly, with a clear API that allows developers to easily create queues and manage task execution. Its priority and concurrency features are intuitive and well-documented.

  • bottleneck:

    Bottleneck is relatively easy to use, with a straightforward API for setting up rate limits and managing function calls. Its simplicity makes it accessible for developers who need to implement rate limiting quickly.

  • promise-queue:

    Promise-Queue is designed for simplicity, making it easy to implement and use for managing promises. Its minimalistic approach allows developers to get started quickly without extensive configuration.

  • queue-promise:

    Queue-Promise is also easy to use, providing a simple interface for adding tasks to the queue and executing them in order. Its straightforward design makes it suitable for developers looking for a basic queuing solution.

Performance

  • async:

    Async is optimized for performance in managing complex workflows, but its overhead can increase with the number of tasks and complexity of control flow. It is best used for scenarios where control flow is more critical than raw performance.

  • p-queue:

    P-Queue performs well in managing task execution with its concurrency control, allowing multiple tasks to run simultaneously while respecting priority. It is suitable for scenarios where task management is crucial for performance.

  • bottleneck:

    Bottleneck is highly performant for rate-limited function calls, allowing you to execute tasks efficiently without overwhelming resources. Its design ensures that tasks are executed as quickly as possible within the defined limits.

  • promise-queue:

    Promise-Queue offers good performance for simple queuing of promises, but may not be as efficient for high-throughput scenarios where more advanced features are needed.

  • queue-promise:

    Queue-Promise provides decent performance for basic queuing needs, but may not be suitable for high-performance applications requiring complex task management.

Extensibility

  • async:

    Async is highly extensible, allowing developers to create custom control flow functions and integrate with other libraries. This flexibility makes it suitable for complex applications that require tailored solutions.

  • p-queue:

    P-Queue offers extensibility through its priority and concurrency features, allowing developers to customize task management according to their needs. It can be integrated with other libraries for enhanced functionality.

  • bottleneck:

    Bottleneck is extensible through its configuration options, allowing developers to customize rate limits and behavior. However, it is primarily focused on rate limiting rather than broader extensibility.

  • promise-queue:

    Promise-Queue is less extensible, focusing on basic promise management without additional features for customization. It is best suited for straightforward use cases without the need for extensive modifications.

  • queue-promise:

    Queue-Promise is not designed for extensibility, as it provides a simple queuing mechanism without additional configuration options or customization features.

How to Choose: async vs p-queue vs bottleneck vs promise-queue vs queue-promise
  • async:

    Choose Async if you need a versatile library that provides a wide range of utilities for working with asynchronous JavaScript, including control flow functions for managing series, parallel, and waterfall executions, making it suitable for complex workflows.

  • p-queue:

    Choose P-Queue if you need a promise-based queue with advanced features like priority support and concurrency control, making it suitable for managing tasks that require specific execution order and resource management.

  • bottleneck:

    Choose Bottleneck if you require a powerful rate limiter that can control the execution rate of asynchronous functions, making it ideal for scenarios where you need to limit the number of requests to an API or manage resource-intensive tasks without overwhelming the system.

  • promise-queue:

    Choose Promise-Queue if you want a simple and lightweight queue specifically designed for promises, allowing you to manage the execution of asynchronous tasks in a straightforward manner without additional complexity.

  • queue-promise:

    Choose Queue-Promise if you need a basic promise queue that is easy to use and integrates well with existing promise-based code, making it a good choice for simple task management without the overhead of more complex libraries.

Similar Npm Packages to async

async is a utility module that provides powerful functions for working with asynchronous JavaScript. It simplifies the process of managing asynchronous operations, allowing developers to write cleaner and more maintainable code. With features like parallel execution, series execution, and control flow, async is particularly useful for handling complex asynchronous workflows. However, there are several alternatives in the JavaScript ecosystem that also provide similar functionalities. Here are a few notable ones:

  • bluebird is a fully-featured promise library that offers a wide range of utilities for working with promises. It enhances the native Promise functionality by providing additional features such as cancellation, progress tracking, and more robust error handling. bluebird is known for its performance and is a great choice for developers looking for an advanced promise library that can handle complex asynchronous tasks with ease.

  • p-map is a lightweight utility that allows you to map over an array asynchronously, executing a provided function for each element in parallel. It is particularly useful when you need to perform asynchronous operations on an array of items and want to control the concurrency level. p-map is simple to use and can be a great alternative for scenarios where you need to process multiple asynchronous tasks without the overhead of a larger library.

  • q is another promise library that focuses on providing a simple and straightforward API for working with asynchronous code. It was one of the earlier promise libraries in the JavaScript ecosystem and offers features like chaining, error handling, and more. While it may not be as feature-rich as some of the newer libraries, q is still a solid choice for developers looking for a lightweight solution for managing asynchronous operations.

To see how async compares with bluebird, p-map, and q, check out the comparison: Comparing async vs bluebird vs p-map vs q.

Similar Npm Packages to p-queue

p-queue is a promise-based queue implementation for managing asynchronous tasks in JavaScript. It allows developers to control the concurrency of tasks, ensuring that a specified number of tasks run simultaneously while others wait in line. This is particularly useful when dealing with APIs or other asynchronous operations that may have rate limits or require controlled execution. With features like priority support and the ability to pause and resume queues, p-queue provides a flexible solution for managing complex asynchronous workflows.

There are several alternatives to p-queue that also provide functionality for managing asynchronous tasks:

  • async is a widely-used utility module that provides a variety of functions to work with asynchronous JavaScript. It includes methods for controlling concurrency, such as async.eachLimit and async.parallelLimit, which allow you to run multiple asynchronous operations in parallel with a specified limit. While async is a powerful library with a broad range of features, it may be considered more heavyweight compared to p-queue, especially if you only need simple queuing functionality.

  • p-all is a lightweight utility that allows you to run multiple promise-returning functions concurrently and returns a promise that resolves when all of the promises have resolved. It provides a simple way to manage concurrency without the additional features found in p-queue. If your primary need is to run a set of promises concurrently without the overhead of a full queue implementation, p-all is an excellent choice.

  • p-limit is another minimalist utility that allows you to limit the number of concurrent promises. It creates a function that can be called with promise-returning functions, ensuring that only a specified number of them are executed at any given time. This is particularly useful for controlling resource usage when dealing with APIs or other asynchronous tasks. If you need a straightforward way to limit concurrency without the additional features of a queue, p-limit is an ideal solution.

To see how p-queue compares with async, p-all, and p-limit, check out the comparison: Comparing async vs p-all vs p-limit vs p-queue.

Similar Npm Packages to bottleneck

bottleneck is a powerful rate-limiting library for JavaScript that helps manage the execution of asynchronous tasks. It allows developers to control how many tasks are executed concurrently and to set limits on the rate at which tasks can be processed. This can be particularly useful when dealing with APIs that have rate limits or when you want to prevent overwhelming a server with too many requests at once. Bottleneck provides a flexible and easy-to-use API for managing these constraints, making it a popular choice for developers looking to optimize their asynchronous workflows.

Here are some alternatives to bottleneck:

  • async is a utility module that provides powerful functions for working with asynchronous JavaScript. It offers a variety of methods for managing asynchronous control flow, including parallel execution, series execution, and more. While async does not specifically focus on rate limiting, it provides a robust set of tools for handling asynchronous operations, making it a versatile choice for many developers. If you need a comprehensive toolkit for managing asynchronous tasks beyond just rate limiting, async is a solid option.
  • p-limit is a simple and lightweight library that allows you to limit the number of concurrent promises. It provides a straightforward API for controlling the concurrency of asynchronous operations, making it easy to prevent overwhelming resources or APIs. If you are looking for a minimalistic solution specifically focused on limiting concurrency, p-limit is a great choice that integrates well with promise-based workflows.
  • promise-limit is another library designed to limit the number of concurrent promises. It offers a simple API for managing the execution of asynchronous functions, allowing you to specify how many promises can run simultaneously. If you need a straightforward way to control concurrency without the additional features of a more complex library, promise-limit can be an effective solution.
  • rate-limiter-flexible is a flexible and powerful rate-limiting library that can be used in both Node.js and browser environments. It allows you to implement various rate-limiting strategies, such as limiting requests per second, minute, or hour. This library is particularly useful for applications that require advanced rate-limiting capabilities, such as those interacting with APIs that enforce strict rate limits.

To see how bottleneck compares with async, p-limit, promise-limit, and rate-limiter-flexible, check out the comparison: Comparing async vs bottleneck vs p-limit vs promise-limit vs rate-limiter-flexible.

Similar Npm Packages to promise-queue

promise-queue is a JavaScript library that helps manage a queue of promises, allowing developers to control the concurrency of asynchronous operations. It provides a simple way to limit the number of promises that can be executed simultaneously, which is particularly useful when dealing with APIs or resources that have rate limits. While promise-queue is effective for managing promise execution, there are several alternatives that offer similar functionality. Here are a few noteworthy options:

  • async is a widely-used utility module that provides powerful functions for working with asynchronous JavaScript. It includes a variety of methods for managing asynchronous control flow, including queues, series, and parallel execution. async is particularly useful for handling complex workflows where you need to manage multiple asynchronous tasks in a structured way. Its extensive feature set makes it suitable for a wide range of scenarios, from simple promise management to complex asynchronous workflows.

  • bottleneck is a rate limiter for JavaScript that provides a robust way to control the execution of asynchronous functions. It allows you to set limits on how many times a function can be called in a given timeframe, making it ideal for scenarios where you need to avoid overwhelming a server or API. bottleneck is highly configurable, allowing you to set different limits for different functions, and it can handle both promise-based and callback-based functions seamlessly.

  • p-queue is a promise queue implementation that allows you to manage the concurrency of promise-based tasks. It provides a simple API for adding tasks to the queue and controlling how many tasks can run simultaneously. p-queue is particularly useful when you need to manage a large number of asynchronous operations while ensuring that you don't exceed certain concurrency limits. Its lightweight nature and focus on promises make it a great alternative to promise-queue.

  • queue-promise is another library designed for managing a queue of promise-based tasks. It allows you to control the concurrency of your asynchronous operations while providing a straightforward API for adding tasks to the queue. queue-promise is particularly useful for scenarios where you need to ensure that tasks are executed in a specific order while managing concurrency effectively.

To explore how promise-queue compares with async, bottleneck, p-queue, and queue-promise, check out the comparison: Comparing async vs bottleneck vs p-queue vs promise-queue vs queue-promise.

README for async

Async Logo

Github Actions CI status NPM version Coverage Status Join the chat at https://gitter.im/caolan/async jsDelivr Hits

Async is a utility module which provides straight-forward, powerful functions for working with asynchronous JavaScript. Although originally designed for use with Node.js and installable via npm i async, it can also be used directly in the browser. An ESM/MJS version is included in the main async package that should automatically be used with compatible bundlers such as Webpack and Rollup.

A pure ESM version of Async is available as async-es.

For Documentation, visit https://caolan.github.io/async/

For Async v1.5.x documentation, go HERE

// for use with Node-style callbacks...
var async = require("async");

var obj = {dev: "/dev.json", test: "/test.json", prod: "/prod.json"};
var configs = {};

async.forEachOf(obj, (value, key, callback) => {
    fs.readFile(__dirname + value, "utf8", (err, data) => {
        if (err) return callback(err);
        try {
            configs[key] = JSON.parse(data);
        } catch (e) {
            return callback(e);
        }
        callback();
    });
}, err => {
    if (err) console.error(err.message);
    // configs is now a map of JSON data
    doSomethingWith(configs);
});

var async = require("async");

// ...or ES2017 async functions
async.mapLimit(urls, 5, async function(url) {
    const response = await fetch(url)
    return response.body
}, (err, results) => {
    if (err) throw err
    // results is now an array of the response bodies
    console.log(results)
})
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