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Rolldown

Rolldown is a Rust-based Rollup-compatible bundler coming in Vite 8. Designed as a drop-in replacement for Rollup that keeps the plugin API + config shape while moving the bundling core to Rust for speed.

Performance contribution to vinext benchmarks

In the 2026-02-24 launch benchmark, swapping Vite 7 (Rollup) for Vite 8 (Rolldown) is the single change that moves vinext from 1.6× faster to 4.4× faster than Next.js 16 + Turbopack on the 33-route App Router fixture (4.64 s → 1.67 s production build). "Vite's architecture, and especially Rolldown, has structural advantages for build performance that show up clearly here."

Seen in

• sources/2026-02-24-cloudflare-how-we-rebuilt-nextjs-with-ai-in-one-week — canonical wiki instance. The 4.4× faster build-time result is attributed specifically to Rolldown + Vite 8.

Related

• systems/vite — the build tool; Vite 8 ships Rolldown.
• systems/rollup — the JS bundler Rolldown is compatible with and replaces.
• systems/turbopack — Next.js's bespoke Rust bundler; the benchmark baseline Rolldown-on-Vinext beats.
• systems/vinext — production consumer.