Blogs›Vercel›Package Import Optimization
Vercel's Next.js has introduced `optimizePackageImports` to automatically optimize package imports, addressing performance issues caused by barrel files. This feature analyzes package entry points to directly import modules, bypassing the overhead of barrel files. It offers significant improvements in local development speed, production build times, and faster cold starts in serverless environments. The system also handles recursive barrel files and is pre-configured for common libraries, with plans for further automation.
10/13/2023
Introduced `optimizePackageImports` in Next.js 13.5 to automatically optimize package imports by analyzing barrel files and directly importing modules. This replaces the manual `modularizeImports` configuration and offers significant performance gains in local development, production builds, and cold starts. The feature recursively handles barrel files and includes pre-configurations for popular libraries.