# mrousavy/react-native-multithreading

🧵 Fast and easy multithreading for React Native using JSI

Repository: https://github.com/mrousavy/react-native-multithreading
Canonical: https://ross.abutalabs.com/products/react-native-multithreading
Language: C++
License: MIT
License Family: permissive
Topics: react-native, react, native, jsi, multithreading, multiprocessing, js, worklet, thread, threading, threads, typescript
Last push: 2022-11-18T05:08:56+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 1997, "days_push": 1384, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1171, forks 52 (observed 2026-08-28T04:03:51.612556+00:00)

## What it is
A React Native library that provides fast, low-overhead multithreading via JSI, letting developers offload blocking JavaScript calls or expensive calculations to separate threads. It is explicitly a proof of concept and not intended for production use.

## Use cases
- run blocking JS calls off the main React Native thread
- offload expensive calculations to a background thread in React Native
- avoid UI freezes from slow JSI calls like storage or SQLite operations
- run JavaScript functions on a separate thread with low overhead
- compute CPU-heavy tasks like Fibonacci in React Native without blocking the JS thread

## When to choose
- you are experimenting with JSI-based threading in React Native
- you need to prototype offloading blocking JS work to another thread
- you want a lightweight alternative to native module bridges for background work

## When to avoid
- you need a production-ready solution - the README explicitly warns against production use
- you need camera frame processing - use react-native-vision-camera frame processors instead
- you need long-term maintenance or broad React Native version support
- you want to avoid manual native file edits during setup

## Facets
- artifact type: library
- maturity: experimental
- function: concurrency, developer-tools
- domain: mobile-development, cross-platform, performance
- platform: cpp
- tags: react-native, jsi, multithreading, worklets, proof-of-concept, native-modules, android, ios

## Member repositories
- mrousavy/react-native-multithreading (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:51.612556+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:28:32.424705+00:00, confidence not recorded.
  - readme: https://github.com/mrousavy/react-native-multithreading (fetched 2026-08-28T04:03:51.612556+00:00, sha 74726c0c0deb)
- Data as of 2026-08-30T08:39:29.467469+00:00.