feat: highly experimental full bundle mode

[sapphi-red]

This PR adds highly experimental full bundle mode.

This is not expected to be used yet, but rather to make the full bundle mode development easier.

[pkg-pr-new]

Open in StackBlitz

pnpm add https://pkg.pr.new/vitejs/vite/@vitejs/plugin-legacy@21235

npm i https://pkg.pr.new/vitejs/vite/@vitejs/plugin-legacy@21235

yarn add https://pkg.pr.new/vitejs/vite/@vitejs/plugin-legacy@21235.tgz

pnpm add https://pkg.pr.new/vitejs/vite@21235

npm i https://pkg.pr.new/vitejs/vite@21235

yarn add https://pkg.pr.new/vitejs/vite@21235.tgz

commit: 9d9488e

[punkpeye]

What is full bundle mode?

[lucas-teks]

@punkpeye https://vite.dev/guide/rolldown#why-introducing-a-full-bundle-mode
This is expected to significantly speed up cold start and full page refresh in large codebases by solving network bottleneck (the request waterfall can be flooded and serves modules slowly). Without full bundle mode only deps are pre-bundled ; but full bundle mode extends this to your src modules in dev env.

In my project, where the HMR is expected to invalidate a lot, this feature is gold.

[punkpeye]

Is this mostly for dev env or does it benefit production too?

[basmilius]

@punkpeye For dev

[grandsong]

I am very excited and looking forward!

My current project is a PWA of a small monorepo scale.
For dev server, the page loads over 1,000 resources, most of which are scripts, and many of which are segments of .vue components.
It was painfully slow.
Then I created an sw.js (service worker) to cache most requests in order to greatly speed up the loading.

This full bundle mode can the utmost solution instead.