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I was debugging some chunking regressions in an app I work on when updating from Vite 7 to Vite 8. I got an AI to generate a tool to help figuring out what was wrong, and I uploaded it at nicolo-ribaudo.github.io/vite-compare/ in case it's useful for anybody else.

nicolo-ribaudo.github.ioVite bundle compareCompare two Vite bundle builds side-by-side: chunk diff, per-entry size analysis, module diff, and an interactive chunk/module graph.

Alexander Lichter

@thealexlichter.com

29 Apr

Thanks for sharing! What was the outcome in your case(s)? 👀

Nicolò Ribaudo

@nicr.dev

29 Apr

Rolldown was over-splitting compared to Rollup, I had to manually configure some groups. It has something to do with cycles across chunks and modules imported both through a static and dynamic imports chain, but I cannot get a minimal reproduction to show the same behavior.

Nicolò Ribaudo

@nicr.dev

Also, for some reason (even if the docs say otherwise) Vite 7 was prioritizing the "package.json#module" field in some of my dependencies while Vite 8 prioritizes "package.json#browser", which caused a bunch of different stuff to be loaded.

29/4/26, 3:26 pm0 reposts0 likes

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