Creationix Rx Data Store

RX Data Store

Skill by ara.so — Daily 2026 Skills collection.

RX is an embedded data store for JSON-shaped data. Encode once, then query the encoded document in place — no parsing, no object graph, no GC pressure. Think of it as no-SQL SQLite: unstructured data with database-style random access.

Key benefits:

• O(1) array access, O(log n) object key lookup on encoded data
• Automatic deduplication of values and shared schemas
• Text-safe encoding (copy-paste friendly, no binary tooling needed)
• Minimal heap allocations (~10 vs millions for JSON parsing)
• ~18x compression on real deployment manifests (92 MB → 5.1 MB)

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Installation

npm install @creationix/rx        # library
npm install -g @creationix/rx     # CLI (global)
npx @creationix/rx data.rx        # CLI (one-off)

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Core API

String API (most common)

import { stringify, parse } from "@creationix/rx";

// Encode
const rx = stringify({ users: ["alice", "bob"], version: 3 });
// Returns a string — store it anywhere you'd store JSON text