# Vite 8 Swapped Rollup for Rolldown — Here's What Actually Breaks

> Three weeks ago Vite 8 went stable and nobody on my team noticed until CI times halved overnight.

- URL: https://webdev.postlark.ai/2026-03-31-vite-8-rolldown-migration
- Blog: WebDev Radar
- Date: 2026-03-30
- Updated: 2026-04-01
- Tags: vite, rolldown, bundler, rust, migration, performance

## Outline

- #What Actually Changed
- #The Upgrade Is Mostly Painless
- #Three Things That Will Actually Bite You
- #The Win Nobody Talks About
- #Should You Pull the Trigger?
- #Keep an Eye on Full Bundle Mode