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24 alternatives to Parallel async JavaScript micro library in 25LOC

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Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Parallel async JavaScript micro library in 25LOC launched in 2014; newer entries below may have overtaken it.

1. 1
   1 KB JavaScript library for building front end apps▲242

   1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

   2017 · github.com · its alternatives →

2. 2
   1 KB JavaScript library for building applications▲116

   1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

   2017 · github.com · its alternatives →

3. 3
   Micron.JS▲214

   A [μ] microInteraction library built with CSS and JavaScript

   2018 · webkul.github.io · its alternatives →

4. 4
   1kb JavaScript library for building front end applications▲187

   1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

   2017 · github.com · its alternatives →

5. 5
   Fast 2kB date library alternative to Moment.js with the same API▲122

   ⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API - iamkun/dayjs

   2018 · github.com · its alternatives →

6. 6
   Simulating 20M Particles in JavaScript▲561

   Had some fun with shared array buffers over many months of free time. Skip to the end to play around with the final app. Open to ideas on how to simulate more whilst staying in js land.

   2024 · dgerrells.com · its alternatives →

7. 7
   JavaScript PubSub in 163 Bytes▲104

   pubsub in <100 bytes. Contribute to hassanshaikley/pico-pubsub development by creating an account on GitHub.

   2025 · github.com · its alternatives →

8. 8
   Cancelable async primitives for JavaScript▲84

   Composable async primitives with cancelation, control over scheduling, and coroutines. Superior replacement for JS Promises. - mitranim/posterus

   2017 · github.com · its alternatives →

9. 9
   Fast.js – faster reimplementations of native JavaScript functions▲323

   Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js

   2014 · github.com · its alternatives →

10. 10
    Python micro event loop library (~250 LOC)▲59

    Micro event loop library to teach the basic concepts of python coroutines and how event loop libraries might be implemented - micro_events.py

    2025 · gist.github.com · its alternatives →

11. 11
    1 KB JavaScript framework for building front-end applications▲216

    1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

    2017 · github.com · its alternatives →

12. 12
    LoadJS – A tiny async loader for modern browsers▲25

    A tiny async loader / dependency manager for modern browsers (961 bytes) - amorey/loadjs

    2016 · github.com · its alternatives →

13. 13
    is.js▲132

    Micro check library for programmers

    2015 · is.js.org · its alternatives →

14. 14
    LoadJS – A tiny async loader for modern browsers▲21

    A tiny async loader / dependency manager for modern browsers (961 bytes) - amorey/loadjs

    2015 · github.com · its alternatives →

15. 15
    HTTP/2 Python-Asyncio Web Microframework▲173

    2018 · gitlab.com · its alternatives →

16. 16
    Nsynjs – JS engine with stoppable threads and without callback hell▲51

    JavaScript engine + state machine with threads and without callbacks - amaksr/nsynjs

    2017 · github.com · its alternatives →

17. 17MJ
    MicroEvent.js - js micro event emitter in less than 20lines▲60

    2011 · notes.jetienne.com · its alternatives →

18. 18
    A self-hosted js compiler in 1k loc▲47

    Minimal self-hosted JavaScript compiler in 1k lines of code - maierfelix/mini-js

    2017 · github.com · its alternatives →

19. 19
    Whirlwind – Async concurrent hashmap for Rust▲140

    Hey HN, this is Will and David from Fortress (https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=41426998). We use a lot of async Rust internally, and created this library out of a need for an async-aware concurrent hashmap since there weren’t many available in the Rust ecosystem. Whirlwind is a sharded HashMap with a fully asynchronous API. Just as dashmap is a replacement for std::sync::RwLock, whirlwind aims to be a replacement for tokio::sync::RwLock. It has a similar design and performance characteristics to dashmap, but seems to perform better in read-heavy workloads with tokio's…

    2024 · github.com · its alternatives →

20. 20
    Million.js▲153

    A fast, <1kb virtual DOM

    2021 · github.com · its alternatives →

21. 21
    Faster.js – a micro-optimizing JavaScript compiler▲89

    faster.js is a Babel plugin that compiles idiomatic Javascript to faster, micro-optimized Javascript. - vzhou842/faster.js

    2018 · github.com · its alternatives →

22. 22JA
    JsonTree, a 3.53kb JavaScript tool for generating html trees from JSON▲78

    a lightweight dependency free javascript micro-library for making collapsable trees with JSON

    2017 · maxleiter.github.io · its alternatives →

23. 23
    Crudlet.js – A common, streamable interface for synchronizing data▲94

    utility library for async iterable iterators. Contribute to crcn/mesh.js development by creating an account on GitHub.

    2015 · github.com · its alternatives →

24. 24
    Parallelise pipelines of Python async iterables▲71

    Utility function to parallelise pipelines of Python asyncio iterators/generators - michalc/asyncio-buffered-pipeline

    2020 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →