Bun 1.3 reaches v1.3.13 as full-stack JavaScript runtime with built-in Redis, MySQL, and zero-config frontend

Bun 1.3 (latest patch v1.3.13, released April 19, 2026) has matured into a batteries-included full-stack JavaScript runtime with a built-in dev server (Bun.serve()), unified SQL API (PostgreSQL, MySQL, SQLite), built-in Redis client, zero-config frontend development, package catalogs for monorepos, and security scanner API. Bun powers an estimated 28% of new JavaScript projects started on GitHub in Q1 2026. Performance: 3.7x throughput over Node.js, 10x faster cold starts, boots APIs in ~1.2ms (37x faster than Node.js). Bun is a single ~40MB binary built in Zig using JavaScriptCore (not V8), with 105,000+ GitHub stars.