Bun v1.2.22 introduces async stack traces for better debugging, 240x faster postMessage and structuredClone for simple objects, and YAML stringify support. The release includes significant improvements to the MySQL adapter with affectedRows and lastInsertRowid support, better column type handling, and TLS connectivity. The bundler gains new minification optimizations, JSX side effects preservation, and an onEnd hook for plugins. Additional enhancements cover WebSocket subprotocol negotiation, Redis database selection, HTTP server idle connection management, event loop delay monitoring, and extensive Node.js compatibility fixes across child_process, crypto, N-API, and other modules.

Bun v1.2.22

Bun v1.2.23 introduces major improvements including pnpm-lock.yaml migration for seamless switching from pnpm, Redis Pub/Sub support, concurrent test execution with configurable parallelism, platform-specific dependency filtering, system CA certificates support, Windows code signing for compiled executables, JSX configuration improvements, SQL array helpers, randomized test ordering, and numerous Node.js compatibility fixes across http, dns, worker_threads, crypto, and other modules.

Bun v1.2.23

Bun is a web development framework and toolkit for building modern, serverless web applications using TypeScript and AWS Lambda. It provides features such as routing, middleware, and serverless functions for developing and deploying scalable, event-driven applications on AWS infrastructure. Readers can explore Bun's architecture, features, and development workflows for building serverless APIs, microservices, and web applications with minimal configuration and operational overhead, leveraging AWS Lambda's scalability and pay-as-you-go pricing model for cost-effective cloud-native development.

Best of Bun — September 2025