libs VS deno

like bun or node or deno (Rust as well as C++).

in techempower, the vast vast majority of code running in the just-js entry is JavaScript. all the core libraries for networking and interacting with the OS are js wrappers around C++/v8. the http server, though incomplete and not production rady, is written in javascript, with http parsing handed off to picohttpparser. the postgres wire protocol is completely written in javascript. in fact, one of the advantages JS and other JIT languages have is you can optimize away a lot of unnecessary logic at run time when you need to. e.g. https://github.com/just-js/libs/blob/main/pg/pg.js#L241

the whole point of doing this was to prove that JS can be as fast as any other language for most real world web serving scenarios.

if i had more time to work on it, i am sure i could improve the fortunes score where it would be at or very close to the top of that ranking too.

yes. it's mostly pure javascript though - postgres library is completely written in JS as is the http framework, which uses C++ wrapper around picohttpparser for fast http parsing. admittedly both are incomplete and need a lot of work done to make them "production ready" but JS is incredibly fast on modern engines like v8 and spidermonkey *if* you are careful about how much garbage you create and spend some time benchmarking and optimising. the C++ in just-js is minimal and mostly just simple wrappers around syscalls.

NodeJS is the dominant Javascript server runtime environment for Javascript and Typescript (sort of) projects. But over the years, we have seen several attempts to build alternative runtime environments such as Deno and Bun, today’s subject, among others.

https://github.com/denoland/deno/issues is the ideal place -- we try to triage all incoming issues, the more specific the repro the easier it is to address but we will take a look at everything that comes in.

Install Node.js (or Bun, or Deno, or whatever JS runtime you prefer) if it's not there

QUIC is very exciting, after seeing what it can do for performance in Cloudflare network and Cloudflare workers, I can't wait to finally see it in Deno[0] 1.41.

[0] https://github.com/denoland/deno/pull/21942#issuecomment-192...

So as an end user it's kind of like https://deno.com/ where you buy into a runtime + comes prepacked with DBs (k/v stores), scheduling, and deploy stuff?

> by storing Unison code in a database, keyed by the hash of that code, we gain a perfect incremental compilation cache which is shared among all developers of a project. This is an absolutely WILD feature, but it's fantastic and hard to go back once you've experienced it. I am basically never waiting around for my code to compile - once code has been parsed and typechecked once, by anyone, it's not touched again until it's changed.

Interesting. Whats it like upgrading and managing dependencies in that code? I'd assume it gets more complex when it's not just the Union system but 3rd party plugins (stuff interacting with the OS or other libs).

~90MB+ at this stage and do now allow compression without erroring out. Deploying ala Golang is not feasible at that level but could well be down the line if this dev branch is picked up again!

The exe output grew from from ~50MB to plus ~90MB from 2021 to 2024: https://github.com/denoland/deno/discussions/9811 which mean Deno is worse than Node.js's pkg solution by a decent margin.

Behind the scenes is a simple Sveltekit-powered server function to fetch a Spotify client token then find a user's recommendation playlist and its track information. A Deno edge function to performs this data fetch and renders server-side Svelte.

If your application is written in JavaScript, integrating it with JavaScript extensions is a no-brainer. However, Secutils.dev is entirely written in Rust. How would I even begin? Fortunately, I recently came across an excellent blog post series explaining how to implement your JavaScript runtime in a Rust application with Deno: