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Tags / Programming languages and compilers /

Concurrency library

Library or async runtime for concurrency: actors, channels, thread pools, or event loops.

Repositories

59

Net stars gained, last 7 days

+227

Top-level Tag

Programming languages and compilers

Net stars gained each day, last 90 days

2026-09-01: +172 net stars. Most from Effect-TS/effect, +117.2026-10-02: +294 net stars. Most from Effect-TS/effect, +252.2026-10-03: +293 net stars. Most from Effect-TS/effect, +258.2026-10-04: +172 net stars. Most from Effect-TS/effect, +118.

Peak days

  1. 1

    Sep 1, 2026 +172 net stars (median day +65)

  2. 2

    Oct 2, 2026 +294 net stars (median day +65)

  3. 3

    Oct 3, 2026 +293 net stars (median day +65)

  4. 4

    Oct 4, 2026 +172 net stars (median day +65)

A peak day has at least 2 times the net stars of the median day of this chart, and at least 100 more. For each peak day, the list shows the repositories that gained the most net stars that day. It also shows their GitHub releases of that day or the day before (UTC), and their creation date when it was 14 days or less before. These events occur near the same day. They do not show why the stars came.

Largest

Most stars in total now.

  1. ReactiveX/RxJava48K

    description: a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

  2. netty/netty35K

    readme: Netty is an asynchronous event-driven network application framework

  3. tokio-rs/tokio34K

    description: A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...

  4. ReactiveX/rxjs32K

    readme: RxJS is a library for composing asynchronous and event-based programs with Observable values.

  5. meta/folly31K

    readme: - Executors: thread pools and other executors

  6. caolan/async28K

    readme: Async is a utility module which provides straight-forward, powerful functions for working with asynchronous JavaScript.

  7. libuv/libuv27K

    readme: Full-featured event loop backed by epoll, kqueue, IOCP, event ports.

  8. ReactiveX/RxSwift25K

    readme: RxSwift's intention is to enable easy composition of asynchronous operations and streams of data

  9. redux-saga/redux-saga22K

    readme: With generators we have full power over how & when effects are executed.

  10. petkaantonov/bluebird20K

    readme: Bluebird is a fully featured promise library with focus on innovative features and performance

All 59 in the Repository Index

How a repository gets this Tag

An agent reads the description, the GitHub topics, and the start of the README of each repository. It chooses Tags only from the Tag list in the AwesomeRepos source code. For each Tag, it quotes the text. A code check keeps the Tag only when the quote is in that text. The quote under each repository is that evidence. A Tag does not rank repositories. It does not say that one repository can replace another. To report a wrong Tag, use "Report a problem with this page" on the page of the repository. All numbers on this page count only visible repositories.