Zero Range Wave Compression (ZRW) v5

Pure-JavaScript integer compressor that beats gzip and brotli on zeros, ramps, and walks.

Zero Range Wave is a specialized lossless codec for integer sequences. It is designed for sensor data, counters, scores, time-series deltas, and any stream that contains long runs, smooth ramps, or small random walks. On those patterns it routinely produces dramatically smaller output than general-purpose compressors.

Full encode/decode round-trip. Library + HTTP API + MCP server.

Install

npm i zero-range-wave-compression

npm package · Node ≥ 18 · ESM only.

Git install (optional): npm i github:ceedot-rock/zero-range-wave-compression

Related MCP server: mcp-compress

Quick start

import { compress, decompress, setLicenseKey } from "zero-range-wave-compression";

// Free Gate or paid key
setLicenseKey(process.env.ZRW_LICENSE); // ZRW-FREE-… / ZRW-START-… / ZRW-PRO-… / ZRW-L33T-…

const packed = compress([0, 0, 0, 1, 2, 3, 4, 5]); // Uint8Array
const back = decompress(packed);                   // exact round-trip

Why it wins on these patterns

• Single-op prefix-free codes for the common cases (repeat, ±1, second difference, Rice, fallback)

• Run-length escape only when a run is long enough (threshold = 4) so short walks stay fast

• Fibonacci coding for small integers, Elias ω escape for large values

• No dictionary warmup cost — excellent on short and medium sequences

Pricing (one-time license)

• Starting Gate

• Pro Starter

• l33t Unlimited

Details: PRICING.md · Free key process: FREE_KEYS.md

Surfaces

Same license key works for all three.

Related packages (SlidPhiLabs)

Site: slidphilabs.vercel.app

License

Commercial license (see PRICING.md). Free Gate limited to 25 evaluation seats.