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Show HN: Ion, a Rust/Tokio powered JavaScript runtime for embedders

https://github.com/alshdavid/ion
30•apatheticonion•5mo ago

Comments

01HNNWZ0MV43FF•5mo ago
Still built on v8, but it claims to present a more Rust-friendly API than competitors
apatheticonion•4mo ago
It's more that it's an abstraction that models JavaScript rather than v8. I'm actually planning to have a swappable engine with an implementation for QuickJS. It will be enabled with `JsRuntimeOptions { backend: JsRuntimeBackend::QuickJS }`.

The public API should remain the same, as will the extensions, so swapping out backends is an interesting idea to explore

CGamesPlay•5mo ago
The async example in the readme is weird. It appears to be an example of tokio::sleep, where you synchronously call into your library before you sleep. Nothing about your library usage is async. In fact, the whole usage of the library is blocking, so I can't even call it from my existing async code. I'm expecting: I can call my async Rust function from JavaScript, and I can await a JavaScript async method. The example should at the very least be using `async fn main`.
apatheticonion•4mo ago
You're right. I've actually removed it because it doesn't make sense.

There's now `call_blocking` and `call_async` to call a JavaScript function from Rust from normal and async call sites

laurencerowe•5mo ago
> To gain access to the Deno (and Node.js compat) standard library used by Deno requires forking deno_cli as they have largely coupled these additions to the main executable.

This is no longer the case. While it does not currently provide a stable API, that functionality exists in the deno_runtime crate and is relatively easy to reuse.

apatheticonion•4mo ago
The deno_runtime crate is indeed easy to use however the exts that provide compat for web apis and Nodejs compat still require forking deno_cli. You can use some of their ext crates https://github.com/denoland/deno/tree/main/ext but not everything.

Also using ops within Workers is challenging, particularly if they share state.

laurencerowe•4mo ago
The web api extensions and Nodejs compatibility stuff are now in deno_runtime: https://github.com/denoland/deno/blob/main/runtime/Cargo.tom...

The CLI only depends on them transitively via deno_runtime: https://github.com/denoland/deno/blob/main/cli/Cargo.toml

For instance I was able to run the following script using just deno_runtime with https://github.com/lrowe/deno_varnish/blob/main/src/main.rs

    import { DatabaseSync } from "node:sqlite";
    console.log(new DatabaseSync(":memory:").prepare("SELECT 1").get());
apatheticonion•4mo ago
Huh, it's come a long way since I last looked at it

France's homegrown open source online office suite

https://github.com/suitenumerique
331•nar001•3h ago•164 comments

British drivers over 70 to face eye tests every three years

https://www.bbc.com/news/articles/c205nxy0p31o
73•bookofjoe•1h ago•61 comments

Start all of your commands with a comma (2009)

https://rhodesmill.org/brandon/2009/commands-with-comma/
404•theblazehen•2d ago•149 comments

Hoot: Scheme on WebAssembly

https://www.spritely.institute/hoot/
75•AlexeyBrin•4h ago•14 comments

First Proof

https://arxiv.org/abs/2602.05192
27•samasblack•1h ago•17 comments

OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
763•klaussilveira•19h ago•239 comments

Reinforcement Learning from Human Feedback

https://arxiv.org/abs/2504.12501
49•onurkanbkrc•4h ago•3 comments

Stories from 25 Years of Software Development

https://susam.net/twenty-five-years-of-computing.html
23•vinhnx•2h ago•2 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
1014•xnx•1d ago•579 comments

Coding agents have replaced every framework I used

https://blog.alaindichiappari.dev/p/software-engineering-is-back
150•alainrk•3h ago•177 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
152•jesperordrup•9h ago•56 comments

Leisure Suit Larry's Al Lowe on model trains, funny deaths and Disney

https://spillhistorie.no/2026/02/06/interview-with-sierra-veteran-al-lowe/
3•thelok•1h ago•0 comments

72M Points of Interest

https://tech.marksblogg.com/overture-places-pois.html
5•marklit•5d ago•0 comments

A Fresh Look at IBM 3270 Information Display System

https://www.rs-online.com/designspark/a-fresh-look-at-ibm-3270-information-display-system
14•rbanffy•4d ago•0 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
100•videotopia•4d ago•26 comments

Making geo joins faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
152•matheusalmeida•2d ago•40 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
260•isitcontent•19h ago•28 comments

Show HN: Kappal – CLI to Run Docker Compose YML on Kubernetes for Local Dev

https://github.com/sandys/kappal
15•sandGorgon•2d ago•3 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
273•dmpetrov•19h ago•145 comments

Software Factories and the Agentic Moment

https://factory.strongdm.ai/
6•mellosouls•1h ago•3 comments

Ga68, a GNU Algol 68 Compiler

https://fosdem.org/2026/schedule/event/PEXRTN-ga68-intro/
32•matt_d•4d ago•8 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
542•todsacerdoti•1d ago•262 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
415•ostacke•1d ago•107 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
61•helloplanets•4d ago•60 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
360•vecti•21h ago•161 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
330•eljojo•22h ago•201 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
453•lstoll•1d ago•297 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
370•aktau•1d ago•193 comments

Cross-Region MSK Replication: K2K vs. MirrorMaker2

https://medium.com/lensesio/cross-region-msk-replication-a-comprehensive-performance-comparison-o...
7•andmarios•4d ago•1 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
59•gmays•14h ago•23 comments