Show HN: Pseudogress – high performance PostgreSQL mock for testing

Category: devtools

Tags: postgresql, load-testing, mock-server, rust, database-simulation

Score: 7.3/10 (Innovation: 7, Technical: 8, Documentation: 7, Utility: 7)

Pseudogress is a high-performance PostgreSQL mock server written in Rust that simulates many virtual databases for load-testing PostgreSQL clients, especially multi-tenant PostgREST. It records real database responses and replays them with configurable latency and faults, allowing thousands of connections without a real database. The project uses a class-based configuration, records time-aware data, and provides a Nix-based build.

Target audience: backend developers, devops engineers, database administrators

Repository: https://github.com/mkleczek/pseudogress · Rust · AGPL-3.0

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