deploy_feedback VS deno_std

Hey all, Andy from the Deno team here. We're excited to share with you Deno Subhosting, an easy way to extend your platforms functionality by securely running untrusted JavaScript written by your users.

When we first launched [Deno Deploy](https://deno.com/deploy) in 2021, we were surprised at the volume of requests from companies about getting access to the APIs needed to run Deno Deploy. Many companies wanted to give their users the ability to write custom logic in their app, but setting this up in the cloud presents security concerns and a ton of infra work/maintenance.

We realized that there was an opportunity for Subhosting to solve a larger problem, which is allowing companies to easily and securely run custom code written by their users, without the hassle of maintaining said infrastructure.

Though we do have a few subhosting customers (Netlify being one of them), this launch makes our Subhosting product self-service, so any development team interested in extending their platform via their users' custom code can do so by [signing up](http://dash.deno.com/subhosting/new_auto) and [reading our docs](https://docs.deno.com/deploy/manual/subhosting). We have [an updated pricing model for Subhosting](https://deno.com/deploy/pricing?subhosting) as well, including a generous free tier fit for kicking the tires and building a proof-of-concept.

We'd love to get your feed back. Have you ever talked to your co-workers about allowing external devs to "have at it" with your platform? What would it look like to unlock the final 10% for your top customers? How have you approached this problem in the past?

Thanks for reading and the Deno team will be responding to comments!

[Read the announcement blog post.](https://deno.com/blog/subhosting)

That means we don’t need to transpile the Typescript code to ESM or CJS. Currently, only Deno Deploy can run your Typescript function out of the box. However, in order to keep the code small, we still need some sort of bundling. Luckily, Bun is also a bundler 😉

What type of apps do you code for your day-job? (I program for fun and curiosity, so that is why I ask that lame question.)

Do you use node.js? Deno is brought in part by the Node.js creator, Ryan Dahl, who wanted to fix/improve a lot of things he didn't like in node.js.

They also have "Deno Deploy" (with a free tier) to run your code on different servers scattered throughout the globe: https://deno.com/deploy

One of the reasons I love the `deno` executable is you can use `import` statements in your code and then tell `deno` to merge everything into a single .js file. I would then take that and publish it to Cloudflare Workers. I know you can do this with node.js and a bunch of tools, but it is so much simpler with `deno`.

The online version of DocTrack is hosted through Deno Deploy and is accessible here.

It runs on https://deno.com/deploy which runs on gcp at the moment but my understanding is that the underlying cloud provider could change at any time.

For deployment Deno offers it's own service, Deno Deploy:

https://deno.com/deploy

Disclaimer: Haven't used it yet.

Deno functions. Its different than docker containers that auto scale. https://deno.com/deploy

One of the biggest annoyances with Deno deploy/functions is that there is no way to store any data. This would be very useful to e.g. cache an auth token, store a key/value pair, etc. See also: https://github.com/denoland/deploy_feedback/issues/110

Is any work being done to fix this? Or is this out of scope currently?

One of the valuable features of Solid Start is that you can use so-called "adapters" to completely change the output into something deployable basically everywhere that serves pages and with quite a lot of options: there are adapters for amazon web services, cloudflare pages and workers, deno deploy, netlify, standard node server (the default), vercel, and static deployment - the latter allows us to build something that we can put on github pages.

For reference (for the issues you mentioned): 1. This issue was opened almost immediately to solve the weird .only function not working https://github.com/denoland/deno_std/issues/2979 2. That looks weird to me, will get back to you on this one since it should work I think 3. Generally polluting the global namespace isn't great, but because we're only polluting the namespace of a module (and we choose what parts to import), I personally find it quite freeing. I entirely understand how that might feel awkward. 4. you CAN specifying only writing to certain directories! --allow-write=/path/to/dir would allow that!

At least for the ones related to trees, it's just a renaming. Below is a link to the PR. When I initially implemented these trees, I chose the names BSTree and RBTree to keep the names short. I'm guessing the person that proposed renaming them did so to make it more obvious what they are.

https://github.com/denoland/deno_std/pull/2400

The standard library is separate from the runtime. It wouldn't break backward compatibility if you were to update. For example, if you were importing RBTree and upgraded Deno to the latest release, it would keep working just fine. You would only really need to switch to using RedBlackTree instead if there was a change made to it that you wanted.

I think the only time you would need to update your standard module imports to be able to use newer versions of the Deno runtime if the standard module were depending on runtime APIs that have a breaking change.

It is like Demo deprecating fs.exists().[1]

[1]https://github.com/denoland/deno_std/discussions/2102

This was fun to read through.

I would need to profile the code, but the startup time being bad for Deno seems like maybe a combination of the code in here being unoptimized:

https://github.com/denoland/deno_std/blob/0ce558fec1a1beeda3...

(Ex. Lots of temporaries)

And usage of the readFileSync+TextDecoder API instead of readTextFile (which is also a docs issue since it's suggests the first one). It seems the code loads the 100MB into memory, then converts to another 100MB of utf8, then parses with that inefficient csv decoder. The rust and go versions look to be doing stream/incremental processing instead.

But it there's some talk to reconsider it

Sorry to hear that. I want to provide expect API in deno_std in the future: https://github.com/denoland/deno_std/issues/1779

I just migrated the module to Deno and rewrote the test cases using the Deno test runner. Also contributed a bug fix to the test runner that I encountered during the migration. An npm version is still available and automatically generated from the Deno code via a small bash script (rewriting imports, adding an index.ts, etc.).

Much of Node.js is written in C, yet it's still called Node.js.

Deno has some JavaScript/TypeScript in it. On GitHub https://github.com/denoland/deno is 22.8% JavaScript and 13.2% TypeScript, and https://github.com/denoland/deno_std is 68.2% JavaScript and 31.6% TypeScript.

So to me it's misleading about the name, but not about what Deno is written in.