rolldown

Astro shipped the first alpha of its next major version on April 30 with two breaking changes: an upgrade to Vite 8's Rolldown-based bundler and the retirement of the Go compiler in favor of a Rust-based one that was previously gated behind experimental.rustCompiler.

Vite 8.0 replaces its dual esbuild-and-Rollup architecture with Rolldown, a Rust-based bundler delivering 10-30x faster builds. Linear reports build times dropping from 46 to 6 seconds.