theMackabu/ant has 1,324 GitHub stars and 35 forks. GitHot measured +3 stars in 24 hours and +8 in 7 days. Last checked 2026-11-10 20:09 UTC. Last push 2026-11-02.
javascript for 🐜's, a tiny runtime with big ambitions
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README.md
オリジナル🐜 Ant
An ant carries 50× its weight. So does this one.
Ant is a lightweight, high-performance JavaScript runtime built from scratch.
Built to carry more than it weighs without compromising performance.
$ ls -lh ant
-rwxr-xr-x⠀9.5M⠀ant*
# built with -Os
-rwxr-xr-x⠀5.8M⠀ant*
Table of contents
- Why Ant?
- Installation
- Benchmarks
- Spec conformance
- Building Ant
- Docker Images
- Security
- Community
- Contributing to Ant
Why Ant?
| Ant | Node | Bun | Deno | |
|---|---|---|---|---|
| Binary size | ~9 MB | ~140 MB | ~61 MB | ~77 MB |
| Cold start | ~4 ms | ~30 ms | ~10 ms | ~18 ms |
| Engine | Ant Silver | V8 | JSC | V8 |
| JIT | ✓ | ✓ | ✓ | ✓ |
| WinterTC conformant | ✓ | partial | ✓ | ✓ |
Ant is designed for environments where size and startup time matter: serverless functions, edge computing, embedded systems, CLI tools, and anywhere you'd want JavaScript but can't afford a 50MB+ runtime.
Ant Silver is an independent engine, not a wrapper around V8, JSC, or SpiderMonkey. The JIT compiler uses a fork of MIR, a lightweight backend that enables near-native performance.
Installation
curl -fsSL https://antjs.org/install | bash
Spec conformance
Ant targets the WinterTC Minimum Common API specification, the standard for server-side JavaScript interoperability developed by Ecma TC55.
| Suite | Pass rate | Notes |
|---|---|---|
| compat-table | 100% | 1511/1511 (ES1–ES5, ES6, ES2016+, ESNext) |
| Temporal | 100% | 4603/4603 at revision 2026-08-10 |
| test262 | ~75% | 40243/53578 run on 2026-10-21 |
Benchmarks
Cold start
Measures the time to import Hono, register routes, and exit. Each runtime loads the same bench-coldstart.js script from examples/npm/hono/ that creates a Hono app with two routes, prints "ready", and calls process.exit(0). No HTTP server is actually started, this isolates module resolution and initialization overhead.
Measured with hyperfine (10 warmup runs, 100 timed runs):
hyperfine --warmup 10 --runs 100 \
'ant examples/npm/hono/bench-coldstart.js' \
'node examples/npm/hono/bench-coldstart.js' \
'bun examples/npm/hono/bench-coldstart.js' \
'deno run --allow-read --allow-env examples/npm/hono/bench-coldstart.js'
| Runtime | Mean | Min | Max | Relative |
|---|---|---|---|---|
| Ant | 3.9 ms | 2.1 ms | 5.3 ms | 1.00 |
| Bun | 8.8 ms | 6.7 ms | 10.7 ms | 2.26× slower |
| Deno | 18.6 ms | 16.2 ms | 20.8ms | 4.74× slower |
| Node | 29.4 ms | 27.3 ms | 32.6 ms | 7.50× slower |
Environment
| Detail | Value |
|---|---|
| Hardware | Apple M5 Pro, 64 GB RAM, 18 cores |
| OS | macOS 27.0 Golden Gate (26A5406e) |
| Ant | 14.1.aa53d9d1.0 |
| Node | 26.5.1 |
| Bun | 1.4.0 |
| Deno | 2.9.5 |
Building Ant
See BUILDING.md for instructions on how to build Ant from source and a list of supported platforms.
Docker Images
Pull the published image for linux/amd64 or linux/arm64.
docker pull themackabu/ant:latest
docker run --rm themackabu/ant:latest --version
docker run --rm -v "$PWD:/app" themackabu/ant:latest index.js
You can also build the container from source:
docker build -t ant .
docker run --rm ant --version
docker run --rm -v "$PWD:/app" ant index.js
Security
For information on reporting security vulnerabilities in Ant, see SECURITY.md.
Community
Contributing to Ant
We welcome contributions through pull request. See CONTRIBUTING.md for more details.
For information about the governance of Ant, see GOVERNANCE.md.