데이터베이스가 정말 필요한가

By benchmarking file-based approaches (linear scan, in-memory indexing, binary search) against SQLite, this article reveals that databases aren't necessary for early-stage products—simple file management can handle millions of DAU. Databases become essential only when data exceeds RAM, complex queries or joins are needed, or multi-process consistency is required, challenging conventional wisdom about when to introduce database complexity.