just-js/just
the only javascript runtime to hit no.1 on techempower :fire: observed · 2026-08-28
Health v2 · maintenance only
23/100
- Activity 0
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 2238
- days_rel: n/a
- days_push: 1020
- n_releases_24m: 0
Adoption not part of the score
3808 stars · 123 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Just is a very small JavaScript runtime for Linux built directly on V8 and system calls, designed for writing system software with near-native performance. It reached #1 on TechEmpower benchmarks and doubles as a teaching platform for Linux system programming and V8 internals.
Use cases
- run javascript scripts on linux with minimal overhead
- build high-performance http servers in javascript
- learn linux system programming and v8 internals
- write system software in javascript without node.js
- benchmark a javascript runtime against native frameworks
When to choose
- you need a tiny, hackable JS runtime on linux with minimal dependencies
- you want maximum raw performance for javascript http workloads
- you want to learn how runtimes and v8 work internally
When to avoid
- you need cross-platform support (linux x86_64 only)
- you need ES modules or a rich standard library
- you need an actively maintained project (development moved to just-js/lo)
Facets
cli-tool · maturity maintenance
http-server cli developer-tools programming-languages developer-tools performance cli javascript-runtime v8 system-programming techempower low-level command-line linux javascript
2 sources
- readme: https://github.com/just-js/just · fetched 2026-08-28 · fb476d276a09
- homepage: https://just.billywhizz.io/ · fetched 2026-08-29 · fe1f36dd0a47
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| just-js/just | main | 23 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem