split option for adapter-cloudflare

[nCrafts]

Describe the problem

So it seems that sveltekit deploys the whole app (minus the static parts) as a single worker.js file. Cloudflare has a limit of 1mb for this file.

How does one structure an application that doesn't exceed 1mb in total?

Example, I am using markdown to store content in my project, which is imported using this code in +pager.server.ts:

const modules = import.meta.glob('../../markdown/**/*.md')

Unless I am doing something wrong it seems that the single worker.js file now includes all of the markdown files?

Related: #2963

Describe the proposed solution

I don't really know. Maybe a way for the adapter to scale to something larger?

Alternatives considered

I've looked at Vercel but I don't like the pricing, and cloudflare seems to offer more features.

Importance

i cannot use SvelteKit without it

Additional Information

No response

[benmccann]

Vercel has a split option: https://kit.svelte.dev/docs/adapter-vercel#deployment-configuration. This sounds like a request to have that option in adapter-cloudflare as well

#2963 looks quite related

[nCrafts]

I believe the Cloudflare allows 5mb on the paid plans, which gives some more room. Still, being able to split the app would be amazing.

I am not sure if it’s possible though. It seems that Cloudflare expects one _worker.js file:
https://developers.cloud flare.com/pages/how-to/refactor-a-worker-to-pages-functions/

[benmccann]

@jrf0110 do you know if this feature is possible to implement on Cloudflare Pages?

[markjaquith]

Note that these limits (1MB free, 5MB paid) are after gzip compression. My SvelteKit app produces a 1.75MB _worker.js file, but it gzips down to 405KB. If I do some JS minification before gzipping, I can get it slightly smaller... 376KB. There might be some more that SvelteKit can squeeze in with minification.

I don't think it's possible to do auto splitting yet (see this ticket), but you can petition them on a case-by-case basis to raise the limit for you: https://forms.gle/ukpeZVLWLnKeixDu7

[nCrafts]

Another thing to add, and maybe this is something to control within Sveltekit: the content of my pre-rendered routes is also being added to the _worker.js file.

Example, if I add a .md page to my route, while enabling pre-rendering, the content of this .md file ends up in the _worker.js file, even though the page is pre-rendered.

Beyond the file size itself having a large _worker.js file will increase the worker startup time. Having all the raw text content of the website load on every worker invocation is not very effective.

Any advice would be welcome.

[jrf0110]

@jrf0110 do you know if this feature is possible to implement on Cloudflare Pages?

Soon :) cloudflare/workers-sdk#2769

[bgronek]

Looks like cloudflare/workers-sdk#2769 has been merged and deployed. So does this now need to be incorporated into the adapter?

[eltigerchino]

closing in favour of #2963