LokiJS In-Memory Database

LokiJS is a fast, document-oriented JavaScript in-memory database designed for various environments including browsers, Node.js, and NativeScript. It functions by storing JavaScript objects as documents in a NoSQL fashion, enabling high-performance retrieval through indexing and dynamic views. Currently at version 1.5.12, its release cadence appears infrequent, with the last major update several years ago. Key differentiators include its small footprint, suitability for client-side session stores, and built-in persistence adapters (like localStorage, IndexedDB, or filesystem) that can be extended with custom solutions. It prioritizes speed by maintaining unique and binary indexes and offering dynamic views for frequently accessed data subsets, making it ideal for performance-critical applications where data can reside primarily in memory.