SQLite as a Blockchain State Store: Architecture, Performance, and the Case for Simplicity
When most engineers hear "production database," they think PostgreSQL or MySQL. When they hear "SQLite," they think "development only" or "mobile apps."
This is wrong. SQLite in WAL (Write-Ahead Logging) mode is a legitimate production database — it powers every iPhone, every Android device, every Chrome and Firefox browser, and most embedded systems. It processes millions of writes per day in some of the most demanding environments on the planet.
So why shouldn't it power a blockchain's world state?
Here's the architecture, the performance characteristics, and why using SQLite for blockchain state storage is a feature, not a compromise.
