ByteDance Web Infra

Oct 31, 2025 · Frontend Development

What’s New in Rspack 1.6? Explore Enhanced Tree Shaking, Import Defer, and Faster Builds

Rspack 1.6 is officially released, bringing enhanced tree shaking for dynamic imports, native support for the import defer syntax, a new experimental EsmLibraryPlugin for cleaner ESM bundles, default barrel optimization, stable layer handling, JSX preservation, source‑map extraction, significant performance gains, and a host of updates across the Rstack ecosystem such as Rsbuild, Rspress, Rslib, Rstest and Rsdoctor.