v1.4.1Released September 28, 2026
Bun v1.4+ Isolated Serverless Edge Execution Environment
Sub-millisecond process boot times, native TypeScript compilation, and 65% reduced memory footprints powering our serverless API runtime.
Why Bun Replaced Legacy Node.js Runtimes
Traditional serverless platforms execute Node.js containers that require transpilation (Babel/Webpack), take 250ms–1500ms to boot, and consume 150MB+ RAM for simple Express servers. Bun v1.4+ executes native TypeScript directly with instant startup and optimized memory allocation.
Native WebSockets & Real-Time Performance
In v1.4.1, all generated backends leverage Bun.serve({ fetch, websocket }), enabling bi-directional real-time communication for live chat feeds, order status updates, and interactive notifications without third-party Redis pub/sub brokers.
