pipa-js 0.1.1

A fast, minimal ES2023 JavaScript runtime built in Rust.
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# pipa (枇杷) - A fast, minimal ES2023 JavaScript runtime built in Rust.

## Features

- **ES2023 compliant** — implements the ECMAScript 2023 specification
- **Async/await built-in** — first-class async/await support without transpilation
- **Bytecode support** — compile JavaScript to `.jsc` bytecode files for fast loading and execution, with configurable optimization levels (`-O0` through `-O3`)
- **Fast** — outperforms QuickJS in benchmarks
- **Small** — ~5.2 MB binary (with `repl` feature)
- **Zero-dependency** built-in implementations for:
  - Regex/JSON/Base64/BigInt
  - Unicode
  - `fetch` (HTTP client), `rusttls` required 
  - WebSocket
  - Server-Sent Events (SSE)

No external C libraries or system dependencies for the above — everything is implemented from scratch in Rust.

## Benchmarks (2026-05-20)

V8 benchmark suite comparison (higher is better):

| Benchmark              |   qjs |   node |   boa |  pipa |
|------------------------|-------|--------|-------|-------|
| Richards               |   980 |  46634 |   139 |   977 |
| DeltaBlue              |   937 |  91283 |   143 |  1041 |
| Crypto                 |  1087 |  60024 |   123 |  1117 |
| RayTrace               |  1479 |  80881 |   315 |   994 |
| EarleyBoyer            |  2157 |  97221 |   373 |  1426 |
| RegExp                 |   338 |  13274 |  62.6 |  1014 |
| Splay                  |  2461 |  52843 |   554 |  2002 |
| NavierStokes           |  1837 |  56392 |   292 |  1901 |
| **SCORE (total)**      | **1219** | **54642** | **203** | **1256** |

Ranking: **#1 node** (54642) · **#2 pipa** (1256) · **#3 qjs** (1219) · **#4 boa** (203)

## Usage

```bash
cargo install pipa-js
# Run a script
pipa script.js

# Run precompiled bytecode
pipa script.jsc

# Compile JavaScript to bytecode
pipa -compile input.js output.jsc

# Disassemble bytecode (debugging)
pipa -diss script.jsc

# Specify optimization level (default: -O2)
pipa -O3 script.js

# Start REPL (requires the repl feature)
pipa
```

## Build

```bash
# Default build (includes REPL, fetch, and process support)
cargo build --release

# Minimal build (no REPL, no fetch, no process)
cargo build --release --no-default-features
```

> If using pipa as a library dependency and you don't need REPL/fetch/process features, add it with `default-features = false`:
> ```toml
> [dependencies]
> pipa-js = { version = "0.1.1", default-features = false }
> ```

## License

MIT